Perhaps you should try some spelling variations:
dualen studium » duales studium
duale studium » duales studium, das studium
la literatura » la litterature, a literature
filosofia la » filosofia da, filosofia le, filosofica da
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: "des ((dualen studium) OR (duale studium)) a filosofia la literatura*".