Perhaps you should try some spelling variations:
del literatur » model literatur, teil literatur, igel literatur
next social » text social, context social, agent social
best social » west social, east social, ist social
studies die » studies does, studies dose, studies ds
studie die » studie 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: ((next social) OR (best social)) ((studies die) OR (studie die)) filosofia del literatur.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((next social) or (best social)) ((studies die) OR (studie die)) filosofia del literatur".
• Adding a wildcard symbol may retrieve word variants: ((next social) or (best social)) ((studies die) OR (studie die)) filosofia del literatur*.