Perhaps you should try some spelling variations:
istituto degli » istituto delle, instituto del
storia gotica » storia antica, storia politica, storia critica
istituto del » instituto del, istituto delle, instituto de
instituti di » instituti _, instituti a, institution die
istituto di » instituto de, instituto ad
istituti di » istituti pii, istituiti sic, istituto dos
%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%((istituto di) OR (((((istituti di) OR (((istituto del) OR (istituto degli))))) OR (instituti di)))) storia gotica%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%contributo della%((istituto di) or (((((istituti di) or (((istituto del) OR (istituto degli))))) or (instituti di)))) storia gotica%22".
• Adding a wildcard symbol may retrieve word variants: %contributo della%((istituto di) or (((((istituti di) or (((istituto del) OR (istituto degli))))) or (instituti di)))) storia gotica%22*.