diff --git a/themis/search/doc.py b/themis/search/doc.py
index 231f32d..b017926 100644
--- a/themis/search/doc.py
+++ b/themis/search/doc.py
@@ -138,7 +138,7 @@ class SearchView(BrowserView):
             kw['docMeetingDate'] = {'query': data.get('meeting_date_max'), 'range': 'max'}
 
         if data.get('text'):
-            kw['docSearchableText'] = data.get('text')
+            kw['docSearchableText'] = data.get('text').replace('(', ' ').replace(')', ' ')
         if data.get('number'):
             kw['docNumber'] = data.get('number')
         if data.get('category'):
diff --git a/themis/search/mail.py b/themis/search/mail.py
index 17e9109..8ec2c95 100644
--- a/themis/search/mail.py
+++ b/themis/search/mail.py
@@ -103,7 +103,7 @@ class SearchView(BrowserView):
         if data.get('date'):
             kw['mailDate'] = {'query': [data.get('date'), data.get('date')], 'range': 'minmax'}
         if data.get('text'):
-            kw['mailSearchableText'] = data.get('text')
+            kw['mailSearchableText'] = data.get('text').replace('(', ' ').replace(')', ' ')
         if data.get('number'):
             kw['mailNumber'] = data.get('number')
         if data.get('category'):