Perhaps you should try some spelling variations:
pfander studien » anker studien, lander studie
paper studien » papers studies, partner studien, papers student
e literatura » de literatura, y literatura, e literatur
a filosofia » la filosofia, e filosofia, di filosofia
filosofia e » filosofia de, filosofia del

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: "best ((paper studien) OR (pfander studien)) a filosofia e literatura*".