Perhaps you should try some spelling variations:
istituzioni politischer » istituzioni politiche, institutionen politischer, istituzioni politica
institution politischer » institutionen politischer, institutionen politische, institutions political
teoria della » storia della
storia del » historia del, storia della, storia e
de dolle » de double, de douze, de dol
idee de » idee der, idee des, idee die

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