Perhaps you should try some spelling variations:
historia antiga » historia antigua, historia antiqua, historia argentina
instituto ad » instituto _, institutos de
instituto de » institut der, institution der
istituti pii » istituiti sic, istituto di, instituti di
istituti di » instituti di, istituto di, istituiti sic
%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 ad) OR (instituto de))) OR (((istituti di) OR (istituti pii)))) historia antiga%22.
• Adding a wildcard symbol may retrieve word variants: %contributo della%((((instituto ad) or (instituto de))) or (((istituti di) or (istituti pii)))) historia antiga%22*.