Perhaps you should try some spelling variations:
pela literatura » pena literatura, la literatura, a literatura
filosofia pela » filosofia della, filosofia del, filosofia para
texto duale » texto durante
studien 3 » studien _, studien 4
studien 5 » studien _, studien 4

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: "texto duale ((studien 3) OR (studien 5)) filosofia pela literatura".
• Adding a wildcard symbol may retrieve word variants: texto duale ((studien 3) OR (studien 5)) filosofia pela literatura*.