Perhaps you should try some spelling variations:
dualen studium » duales studium
de litterature » la litterature, et litterature
duale studium » duales studium, das studium
filosofia de » filosofia del
a filosofia » la filosofia, e filosofia, di filosofia

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: "texto ((duale studium) OR (dualen studium)) a filosofia de litterature*".