Perhaps you should try some spelling variations:
del literatur » model literatur, teil literatur, igel literatur
texto social » text social, texas social, tempo social
texts social » tests social, texas social, text social
studien die » studie die, studien der
studien de » studien der, studien des, studien dd

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 social) OR (texts social)) ((studien de) OR (studien die)) filosofia del literatur.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((texto social) OR (texts social)) ((studien de) or (studien die)) filosofia del literatur".
• Adding a wildcard symbol may retrieve word variants: ((texto social) OR (texts social)) ((studien de) or (studien die)) filosofia del literatur*.