diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8943d2007..43100cc21 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,6 +3,9 @@
 ### Features
 1. [#528](https://github.com/influxdata/influxdb-client-csharp/pull/528): Add HttpClient as a part of InfluxDBClientOptions
 
+### Bug Fixes
+1. [#555](https://github.com/influxdata/influxdb-client-csharp/pull/555): Chaining multiple conditions in LINQ queries
+
 ### Dependencies
 Update dependencies:
 
diff --git a/Client.Linq.Test/ItInfluxDBQueryableTest.cs b/Client.Linq.Test/ItInfluxDBQueryableTest.cs
index 581b8f629..6129b1426 100644
--- a/Client.Linq.Test/ItInfluxDBQueryableTest.cs
+++ b/Client.Linq.Test/ItInfluxDBQueryableTest.cs
@@ -71,6 +71,27 @@ orderby s.Timestamp
             Assert.AreEqual(1, sensors.Count);
         }
 
+        [Test]
+        public void QueryExampleNestedOr()
+        {
+            // https://github.com/influxdata/influxdb-client-csharp/issues/481
+            var query = (from s in InfluxDBQueryable<Sensor>.Queryable("my-bucket", "my-org", _client.GetQueryApiSync())
+// ReSharper disable All
+                    where (((((s.SensorId == "id-1") || (s.SensorId == "id-no-5")) || (s.SensorId == "id-no-8")) ||
+                            (s.SensorId == "id-no-10")) || (s.SensorId == "id-no-12"))
+// ReSharper restore All
+                    where s.Value > 12
+                    where s.Timestamp > new DateTime(2019, 11, 16, 8, 20, 15, DateTimeKind.Utc)
+                    where s.Timestamp < new DateTime(2021, 01, 10, 5, 10, 0, DateTimeKind.Utc)
+                    select s)
+                .Take(2)
+                .Skip(2);
+
+            var sensors = query.ToList();
+
+            Assert.AreEqual(1, sensors.Count);
+        }
+
         [Test]
         public void QueryExampleCount()
         {
diff --git a/Client.Linq/Internal/QueryAggregator.cs b/Client.Linq/Internal/QueryAggregator.cs
index fb5286c68..5066559dd 100644
--- a/Client.Linq/Internal/QueryAggregator.cs
+++ b/Client.Linq/Internal/QueryAggregator.cs
@@ -129,12 +129,18 @@ internal void AddLimitTailOffset(string limitOffsetAssignment)
 
         internal void AddFilterByTags(string filter)
         {
-            _filterByTags.Add(filter);
+            if (!string.IsNullOrEmpty(filter))
+            {
+                _filterByTags.Add(filter);
+            }
         }
 
         internal void AddFilterByFields(string filter)
         {
-            _filterByFields.Add(filter);
+            if (!string.IsNullOrEmpty(filter))
+            {
+                _filterByFields.Add(filter);
+            }
         }
 
         internal void AddSubQueries(QueryAggregator aggregator)
diff --git a/Client.Linq/Internal/QueryExpressionTreeVisitor.cs b/Client.Linq/Internal/QueryExpressionTreeVisitor.cs
index f3a4a65ca..618287e02 100644
--- a/Client.Linq/Internal/QueryExpressionTreeVisitor.cs
+++ b/Client.Linq/Internal/QueryExpressionTreeVisitor.cs
@@ -331,62 +331,70 @@ internal static void NormalizeExpressions(List<IExpressionPart> parts)
                 var indexes = Enumerable.Range(0, parts.Count)
                     .Where(i => parts[i] is BinaryOperator)
                     .ToList();
+                var eliminators = new List<Tuple<int, Action>>();
 
                 foreach (var index in indexes)
                 {
                     // "( and )"
                     if (index >= 1 && parts[index - 1] is LeftParenthesis && parts[index + 1] is RightParenthesis)
                     {
-                        parts.RemoveAt(index + 1);
-                        parts.RemoveAt(index);
-                        parts.RemoveAt(index - 1);
-
-                        NormalizeExpressions(parts);
-                        return;
+                        eliminators.Add(Tuple.Create<int, Action>(1, () =>
+                        {
+                            parts.RemoveAt(index + 1);
+                            parts.RemoveAt(index);
+                            parts.RemoveAt(index - 1);
+                        }));
+                        continue;
                     }
 
                     // "( timestamp > )"
                     if (index >= 2 && parts[index - 2] is LeftParenthesis && parts[index + 1] is RightParenthesis)
                     {
-                        parts.RemoveAt(index + 1);
-                        parts.RemoveAt(index);
-                        parts.RemoveAt(index - 1);
-                        parts.RemoveAt(index - 2);
-
-                        NormalizeExpressions(parts);
-                        return;
+                        eliminators.Add(Tuple.Create<int, Action>(1, () =>
+                        {
+                            parts.RemoveAt(index + 1);
+                            parts.RemoveAt(index);
+                            parts.RemoveAt(index - 1);
+                            parts.RemoveAt(index - 2);
+                        }));
+                        continue;
                     }
 
                     // "( < timestamp )"  
                     if (index >= 1 && parts[index - 1] is LeftParenthesis && parts[index + 2] is RightParenthesis)
                     {
-                        parts.RemoveAt(index + 2);
-                        parts.RemoveAt(index + 1);
-                        parts.RemoveAt(index);
-                        parts.RemoveAt(index - 1);
-
-                        NormalizeExpressions(parts);
-                        return;
+                        eliminators.Add(Tuple.Create<int, Action>(10, () =>
+                        {
+                            parts.RemoveAt(index + 2);
+                            parts.RemoveAt(index + 1);
+                            parts.RemoveAt(index);
+                            parts.RemoveAt(index - 1);
+                        }));
+                        continue;
                     }
 
                     // "( or (r["sensor_id"] != p4))"
                     if (index >= 1 && parts[index - 1] is LeftParenthesis && parts[index + 1] is LeftParenthesis)
                     {
-                        parts.RemoveAt(index);
-
-                        NormalizeExpressions(parts);
-                        return;
+                        eliminators.Add(Tuple.Create<int, Action>(1, () => { parts.RemoveAt(index); }));
+                        continue;
                     }
 
                     // "(r["sensor_id"] != p4) or )"
                     if (index >= 1 && parts[index - 1] is RightParenthesis && parts[index + 1] is RightParenthesis)
                     {
-                        parts.RemoveAt(index);
-
-                        NormalizeExpressions(parts);
-                        return;
+                        eliminators.Add(Tuple.Create<int, Action>(1, () => { parts.RemoveAt(index); }));
+                        continue;
                     }
                 }
+
+                if (eliminators.Count > 0)
+                {
+                    eliminators.Sort((e1, e2) => e2.Item1.CompareTo(e1.Item1)); // descending order
+                    eliminators[0].Item2();
+                    NormalizeExpressions(parts);
+                    return;
+                }
             }
 
             // Parenthesis

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