Perhaps you should try some spelling variations:
contributi alla » contributi dalla, contributo alla, contribute all
storia antica » storia gotica, storia romantica, historia antiga
instituto ad » instituto de, instituto _, institutos de
istituti di » instituti di, istituto di, istituti pii

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 alla%((instituto ad) OR (istituti di)) ((storia antica) OR (storia romanza))%22.
• Adding a wildcard symbol may retrieve word variants: %contributi alla%((instituto ad) or (istituti di)) ((storia antica) or (storia romanza))%22*.