Perhaps you should try some spelling variations:
duale studien » duale studium, scale studien, duales studium
filosofia la » filosofia le, filosofica da, filosofia das
filosofia da » filosofia de, filosofia del, filosofia e
texto duale » texto durante
studien die » studie die, studien der

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: texto duale studien die ((filosofia la) OR (filosofia da)) literatura.
• Adding a wildcard symbol may retrieve word variants: texto duale studien die ((filosofia la) or (filosofia da)) literatura*.