Perhaps you should try some spelling variations:
contributo allo » contributo alla, contribute all, contributi alla
storia antica » storia gotica, storia romantica, historia antiga
instituti di » istituti di, instituti _, instituti a
istituto di » instituto de, instituto ad

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 allo%((istituto di) OR (instituti di)) storia antica%22.
• Adding a wildcard symbol may retrieve word variants: %contributo allo%((istituto di) or (instituti di)) storia antica%22*.