Perhaps you should try some spelling variations:
delle studium » duale studium, duales studium, dualen studium
studium das » studium des, studium der, studium die
filosofia a » filosofia da, filosofia la, filosofia _
filosofia e » filosofia de, filosofia del
test delle » testi delle, tesi delle, test della

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 delle studium das ((filosofia a) OR (filosofia e)) literatura*.