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

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: "test de studium da ((filosofia da) OR (filosofia e)) litterature".
• Adding a wildcard symbol may retrieve word variants: test de studium da ((filosofia da) OR (filosofia e)) litterature*.