Perhaps you should try some spelling variations:
nigerian political » german political, american political, indian political
italian political » indian political, capitalism political
william frey » william fry, william frend, william carey

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: william frey (((italian political) OR (nigerian political))).
• Adding a wildcard symbol may retrieve word variants: william frey (((italian political) or (nigerian political)))*.