Perhaps you should try some spelling variations:
storia romantica » storia romanza, teoria semantica, storia gotica
storia politica » historia politica, teoria politica, storia critica
istituiti sic » istituti di, istituti pii
storia antica » storia gotica, historia antiga, storia critica
istituto di » instituto de, instituto ad
%contributo » %contributor, %contribute, %contributi

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: %contributo della%((istituto di) OR (istituiti sic)) ((storia antica) OR (((storia romantica) OR (storia politica))))%22*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%contributo della%((istituto di) or (istituiti sic)) ((storia antica) or (((storia romantica) OR (storia politica))))%22*".