Perhaps you should try some spelling variations:
duale studium » duales studium, dualen studium, das studium
filologica e » filologici e, filosofica e, philologica de
filologia e » fisiologia e, filologici e, filosofia e
test duale » test double, test delle, test orale
studium de » studium der, studium des, studium die

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 studium de ((filologica e) OR (filologia e)) literatura".
• Adding a wildcard symbol may retrieve word variants: test duale studium de ((filologica e) OR (filologia e)) literatura*.