Perhaps you should try some spelling variations:
historia antiga » historia antigua, historia antiqua, historia argentina
storia antica » storia gotica, storia romantica, storia critica
instituto de » institut der, institution der
istituti di » instituti di, istituto di, istituti pii
%contributo » %contributor, %contribute, %contributi

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 della%((instituto de) OR (istituti di)) ((storia antica) OR (historia antiga))%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%contributo della%((instituto de) or (istituti di)) ((storia antica) OR (historia antiga))%22".
• Adding a wildcard symbol may retrieve word variants: %contributo della%((instituto de) or (istituti di)) ((storia antica) OR (historia antiga))%22*.