Perhaps you should try some spelling variations:
european concept » european concepts, european context, europe concept
concept history » context history, conceptual history, concise history
history soil » history social, history so, history some
history sir » history so, history set, history siege
history sql » history self, history so, history set

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