Perhaps you should try some spelling variations:
dualen studium » duales studium, duale studium
texts dualen » des dualen, texts alex, texts damien
filosofia la » filosofia da, filosofica da, filosofia das
filosofia le » filosofia de, filosofia e, filosofia del
studium e » studium _, studium 1, studium 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: "texts dualen studium e ((filosofia la) OR (filosofia le)) litterature*".