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

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: %contributi dalla%((istituto di) OR (istituti di)) storia gotica%22.
• Adding a wildcard symbol may retrieve word variants: %contributi dalla%((istituto di) or (istituti di)) storia gotica%22*.