Perhaps you should try some spelling variations:
duales studium » das studium
duale studien » duale studium, scale studien, dualen studium
a literatura » la literatura, a literature, y literatura
y filosofia » e filosofia, a filosofia, la filosofia
filosofia a » filosofia da, filosofia la, filosofia e

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: quito ((duale studien) OR (duales studium)) y filosofia a literatura*.