diff --git a/xos/coreapi/apihelper.py b/xos/coreapi/apihelper.py
index 005bed3..2c6d012 100644
--- a/xos/coreapi/apihelper.py
+++ b/xos/coreapi/apihelper.py
@@ -471,6 +471,14 @@
             q = Q(**{element.name + "__gte": value})
         elif element.operator == element.IEXACT:
             q = Q(**{element.name + "__iexact": value})
+        elif element.operator == element.CONTAINS:
+            q = Q(**{element.name + "__contains": value})
+        elif element.operator == element.ICONTAINS:
+            q = Q(**{element.name + "__icontains": value})
+        elif element.operator == element.REGEX:
+            q = Q(**{element.name + "__regex": value})
+        elif element.operator == element.IREGEX:
+            q = Q(**{element.name + "__iregex": value})
         else:
             raise Exception("unknown operator")
 
diff --git a/xos/coreapi/protos/common.proto b/xos/coreapi/protos/common.proto
index 5f82f7d..6005ac8 100644
--- a/xos/coreapi/protos/common.proto
+++ b/xos/coreapi/protos/common.proto
@@ -14,6 +14,10 @@
         GREATER_THAN_OR_EQUAL = 3;
         LESS_THAN_OR_EQUAL = 4;
         IEXACT = 5;
+        CONTAINS = 6;
+        ICONTAINS = 7;
+        REGEX = 8;
+        IREGEX = 9;
     }
     QueryOperator operator = 1;
     bool invert = 2;