Perhaps you should try some spelling variations:
historia antiga » historia antigua, historia antiqua, historia argentina
storia antica » storia gotica, storia romantica, storia critica
istituto di » instituto de, instituto ad
istituti di » instituti di, istituti pii, istituiti sic
contributi » contribute, contribution, contributing

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 di) OR (contributo della))%((istituto di) OR (istituti di)) ((storia antica) OR (historia antiga))%22.
• Adding a wildcard symbol may retrieve word variants: %((contributi di) or (contributo della))%((istituto di) or (istituti di)) ((storia antica) or (historia antiga))%22*.