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

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