Perhaps you should try some spelling variations:
institutionen politische » institutionen politischer, institutions political, institutions politics
istituzioni politische » istituzioni politiche, istituzioni politica, institution politischer
storia delle » storia della, teoria delle, teoria della
storia del » historia del, storia della, storia e

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: ((storia delle) OR (storia del)) idee _ delle ((istituzioni politische) OR (institutionen politische)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((storia delle) or (storia del)) idee _ delle ((istituzioni politische) OR (institutionen politische))".
• Adding a wildcard symbol may retrieve word variants: ((storia delle) or (storia del)) idee _ delle ((istituzioni politische) OR (institutionen politische))*.