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