Perhaps you should try some spelling variations:
dualen studium » duales studium
duale studium » duales studium, das studium
a filosofia » la filosofia, e filosofia, di filosofia
filosofia a » filosofia da, filosofia la, filosofia e
testo » test, tests, texto

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 ((duale studium) OR (dualen studium)) a filosofia a literature*".