Perhaps you should try some spelling variations:
duale studium » duales studium, dualen studium
filosofica de » filosoficas de, filosofia de, filosofica da
de literatura » de litterature, la literatura, y literatura
d filosofica » e filosofica, 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: "test ((duale studium) OR (das studium)) d filosofica de literatura*".