Perhaps you should try some spelling variations:
le literatura » la literatura, de literatura, e literatura
duale studium » duales studium, dualen studium
filosofia le » filosofia de, filosofia e, filosofia del
d filosofia » di filosofia, de filosofia, da 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: "tests ((duale studium) OR (das studium)) d filosofia le literatura*".