Perhaps you should try some spelling variations:
historia antiga » historia antigua, historia antiqua, historia argentina
istituiti sic » istituti pii
instituto de » institut der, institution der
istituto di » instituto ad
istituti di » instituti di, istituti pii, istituto del
%contributo » %contributor, %contribute, %contributi

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%((((istituto di) OR (instituto de))) OR (((istituti di) OR (istituiti sic)))) historia antiga%22*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%contributo della%((((istituto di) or (instituto de))) or (((istituti di) OR (istituiti sic)))) historia antiga%22*".