Perhaps you should try some spelling variations:
dualen studium » duales studium, duale studium
filosofica da » filosofia da, filosofia di, filosofica e
testo dualen » des dualen
filosofia de » filosofia del
studium da » studium das, studium a, studium d

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: "testo dualen studium da ((filosofica da) OR (filosofia de)) literatura*".