diff --git a/search-api/search-core/src/main/java/org/sunbird/search/processor/SearchProcessor.java b/search-api/search-core/src/main/java/org/sunbird/search/processor/SearchProcessor.java
index f8f40268b..d51a749f3 100644
--- a/search-api/search-core/src/main/java/org/sunbird/search/processor/SearchProcessor.java
+++ b/search-api/search-core/src/main/java/org/sunbird/search/processor/SearchProcessor.java
@@ -913,7 +913,7 @@ private static QueryBuilder getPostFilterQuery(Map<String, Object> postFilter) {
 					nestedBoolQuery.must(QueryBuilders.termQuery(filters.getKey(), value));
 				}
 			} else if (filters.getValue() instanceof String) {
-				nestedBoolQuery.should(QueryBuilders.termQuery(filters.getKey(), ((String) filters.getValue()).toLowerCase()));
+				nestedBoolQuery.must(QueryBuilders.termQuery(filters.getKey(), ((String) filters.getValue()).toLowerCase()));
 			}
 		}