Perhaps you should try some spelling variations:
a litterature » la litterature, a literature, _ litterature
filosofia a » filosofia da, filosofia la, filosofia e
studium da » studium das, studium d, studium der
studium a » studium am, studium ad, studium _
test des » test der, test test

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 des ((studium da) OR (studium a)) filosofia a litterature*".