Perhaps you should try some spelling variations:
di literatura » de literatura, da literatura, ii literatura
filosofia di » filosofia de, filosofia da, filosofia del
studium 3 » studium _, studium 8, studium im
studium 1 » studium _, studium 8, studium im
test das » test des, test day, west das

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 das ((studium 3) OR (studium 1)) filosofia di literatura".
• Adding a wildcard symbol may retrieve word variants: test das ((studium 3) OR (studium 1)) filosofia di literatura*.