Perhaps you should try some spelling variations:
e literatura » de literatura, y literatura, e literatur
filosofia e » filosofia de, filosofia del
studium y » studium _, studium 3, studium 8
studium 1 » studium _, studium 3, studium 8
test das » test des, test day, west das

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: test das ((studium y) OR (studium 1)) filosofia e literatura.
• Adding a wildcard symbol may retrieve word variants: test das ((studium y) or (studium 1)) filosofia e literatura*.