Perhaps you should try some spelling variations:
la litterature » a literature
filosofia la » filosofia da, filosofia le, filosofica da
test duale » test double, test delle, test orale
studien la » studien lap, studien l, studien das
studien a » studien am, studien _, studien 3

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 duale ((studien la) OR (studien a)) filosofia la litterature*".