diff --git a/rest_framework/filters.py b/rest_framework/filters.py
index 743469f8f..1ef4c7fa0 100644
--- a/rest_framework/filters.py
+++ b/rest_framework/filters.py
@@ -101,18 +101,17 @@ class SearchFilter(BaseFilterBackend):
 
         orm_lookups = [self.construct_search(six.text_type(search_field))
                        for search_field in search_fields]
-
+        and_queries = []
         for search_term in self.get_search_terms(request):
             or_queries = [models.Q(**{orm_lookup: search_term})
                           for orm_lookup in orm_lookups]
-            queryset = queryset.filter(reduce(operator.or_, or_queries))
+            and_queries.append(reduce(operator.or_, or_queries))
 
-        if settings.DATABASES[queryset.db]["ENGINE"] != "django.db.backends.oracle":
-            queryset = queryset.distinct()
+        if settings.DATABASES[queryset.db]["ENGINE"] == "django.db.backends.oracle":
+            pk_list = queryset.filter(reduce(operator.and_, and_queries)).values_list('pk', flat=True)
+            return queryset.filter(pk__in=frozenset(pk_list))
         else:
-            pk_list = queryset.values_list('pk', flat=True)
-            queryset = view.model.objects.filter(pk__in=set(pk_list))
-        return queryset
+            return queryset.filter(reduce(operator.and_, and_queries)).distinct()
 
 
 class OrderingFilter(BaseFilterBackend):