Perhaps you should try some spelling variations:
european converts » european contexts, european concerted, european context
converts history » concerts history, convents history, contents history
concept history » context history, concise history
history ser » history set, history sir, history sea

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: (( european ((concept history) OR (conceptual history)) sir. ) OR ( european converts history ser. )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( european ((concept history) OR (conceptual history)) sir. ) or ( european converts history ser. ))".
• Adding a wildcard symbol may retrieve word variants: (( european ((concept history) OR (conceptual history)) sir. ) or ( european converts history ser. ))*.