Perhaps you should try some spelling variations:
filosofica da » filosofia da, filosofia de, filosofia di
da literatura » la literatura, a literatura, de literatura
studium des » studium der
testen das » testen des, westen das, testen der
studium de » studium der, studium die, studium den

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: "testen das ((studium de) OR (studium des)) filosofica da literatura*".