Perhaps you should try some spelling variations:
duale studien » duale studium, scale studien, duales studium
filologia de » fisiologia de, filosofia de, mitologia de
filologia e » filologica e, fisiologia e, filologici e
test duale » test double, test delle, test orale
studien e » studien es, 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 e ((filologia de) OR (filologia e)) literatura".
• Adding a wildcard symbol may retrieve word variants: test duale studien e ((filologia de) OR (filologia e)) literatura*.