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

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