Perhaps you should try some spelling variations:
contributo alla » contributi alla, contributo allo, contributo della
istituiti sic » istituti di, istituti pii
storia gotica » storia antica, storia politica, storia critica
istituto di » instituto de, instituto ad

Try widening your search to All Fields.

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 alla%((istituto di) OR (istituiti sic)) storia gotica%22.
• Adding a wildcard symbol may retrieve word variants: %contributo alla%((istituto di) or (istituiti sic)) storia gotica%22*.