Perhaps you should try some spelling variations:
pela literatura » pena literatura, la literatura, a literatura
acute studien » acute studies, ante studien, aue studien
dd filosofia » de filosofia, da filosofia, la filosofia
di filosofia » la filosofia, e filosofia
tests acute » testis acute, testing acute, versus acute

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: "tests acute studien ((dd filosofia) OR (di filosofia)) pela literatura".
• Adding a wildcard symbol may retrieve word variants: tests acute studien ((dd filosofia) OR (di filosofia)) pela literatura*.