Perhaps you should try some spelling variations:
del litterature » de litterature, des litteratures, et litterature
des studium » des studiums, das studium, dem studium
studium la » studium a, studium als, studium das
test des » test der, test test

You may be able to get more results by adjusting your search query.

• Adding a wildcard symbol may retrieve word variants: test des studium la filosofia del litterature*.