Perhaps you should try some spelling variations:
filosofia da » filosofia de, filosofia del, filosofia della
der studium » oder studium, dem studium, des studium
filosofia e » filosofia de, filosofia del
studium da » studium das, studium a, studium d

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: "text der studium da ((filosofia da) OR (filosofia e)) litterature*".