Perhaps you should try some spelling variations:
scale studien » scale studies, scale student, duale studien
de literatura » de litterature, la literatura, y literatura
3 filosofia » a filosofia, y filosofia, _ filosofia
e filosofia » la filosofia
sets scale » sets scaled, sets scales, set scale

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: "sets scale studien ((3 filosofia) OR (e filosofia)) de literatura*".