Perhaps you should try some spelling variations:
stories critical » studies critical, theories critical, sources critical
instituti di » instituti _, instituti a, institution die
istituto di » instituto de, instituto ad
istituti di » istituti pii, istituiti sic, istituto del
%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 (instituti di)))) stories critical%22.
• Adding a wildcard symbol may retrieve word variants: %contributo della%((istituto di) or (((istituti di) or (instituti di)))) stories critical%22*.