Perhaps you should try some spelling variations:
republic bulgaria » republics bulgaria, republic belarus, republic albania
republic hungary » republic history
public bulgaria » republics bulgaria, policy bulgaria, muslims bulgaria

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: (((( venezuela, public bulgaria _ ) OR ( venezuela, republic bulgaria _ ))) OR ( venezuela, republic hungary _ )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(((( venezuela, public bulgaria _ ) OR ( venezuela, republic bulgaria _ ))) or ( venezuela, republic hungary _ ))".
• Adding a wildcard symbol may retrieve word variants: (((( venezuela, public bulgaria _ ) OR ( venezuela, republic bulgaria _ ))) or ( venezuela, republic hungary _ ))*.