Perhaps you should try some spelling variations:
a literatura » la literatura, a literature, y literatura
filosofia a » filosofia da, filosofia la, filosofia e
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.

• The words AND, OR and NOT may confuse the search; try adding quotes: "test das ((studium y) OR (studium 1)) filosofia a literatura".
• Adding a wildcard symbol may retrieve word variants: test das ((studium y) OR (studium 1)) filosofia a literatura*.