Perhaps you should try some spelling variations:
"studium die ricerca" » "studium der ricerca", "studium des ricerca", "studium e ricerca", "studium de recerca", "studium due ricercare", "studium ie ricerca", "studium iie ricerca", "studium de ricerca"
"studium di ricerca" » "studium i ricerca", "studium ii ricerca", "studium d ricerca", "studium la ricerca"

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"studium di ricerca\") OR (\"studium die ricerca\"))".
• Removing quotes may allow a broader search: (( studium di ricerca ) OR ( studium die ricerca )).
• Adding a wildcard symbol may retrieve word variants: (("studium di ricerca") OR ("studium die ricerca"))*.