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

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 di filosofia ((pela literatura) OR (la literatura))*".