Perhaps you should try some spelling variations:
del literatur » model literatur, teil literatur, igel literatur
next social » context social, agent social, next society
best social » west social, et social, east social
e filosofia » la filosofia

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 e filosofia del literatur.
• Adding a wildcard symbol may retrieve word variants: ((next social) or (best social)) studies e filosofia del literatur*.