Perhaps you should try some spelling variations:
distribution political » distribution policy, distributions statistical
della distribution » delta distribution, dilla distribution, della distribuzione
storia der » storia del, storia dei, storia de
idee e » idee de, idee 3, idee 2
idee 4 » idee 3

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 der ((((idee e) OR (idee 4))) OR (idee _)) della distribution political.
• Adding a wildcard symbol may retrieve word variants: storia der ((((idee e) or (idee 4))) or (idee _)) della distribution political*.