Perhaps you should try some spelling variations:
institution politischer » institutionen politischer, institutionen politische, institutions political
della institution » della instituzione, della costitutione, odel institution
storia del » historia del, storia della, storia e
idee de » idee der, idee des, idee die
idee e » idee 3, idee _, idee 4

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "storia del ((idee e) OR (idee de)) della institution politischer".
• Adding a wildcard symbol may retrieve word variants: storia del ((idee e) OR (idee de)) della institution politischer*.