Perhaps you should try some spelling variations:
duale studien » duale studium, scale studien, duales studium
es filosofia » e filosofia, em filosofia, la filosofia
y literatura » la literatura
filosofia y » filosofia e, filosofia _, filosofia de
studien es » studien aus, studien bei, studien ein

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: (testo OR tests) duale studien es filosofia y literatura.
• Adding a wildcard symbol may retrieve word variants: (testo or tests) duale studien es filosofia y literatura*.