Perhaps you should try some spelling variations:
duales studium » das studium
filosofia con » filosofia en, filosofia e, filosofia da
studium 1 » studium _, studium 3, studium 8
texto » textos, text, texts

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 duales studium 1 ((((filosofia con) OR (filosofia de))) OR (filosofia del)) literatura.
• The words AND, OR and NOT may confuse the search; try adding quotes: "texto duales studium 1 ((((filosofia con) OR (filosofia de))) or (filosofia del)) literatura".
• Adding a wildcard symbol may retrieve word variants: texto duales studium 1 ((((filosofia con) OR (filosofia de))) or (filosofia del)) literatura*.