Perhaps you should try some spelling variations:
scale studien » scale studies, scale student, duale studien
filosofia de » filosofia del
filosofia a » filosofia da, filosofia la, filosofia e
sets scale » sets scaled, sets scales, set scale
studien la » studien lap, studien a, studien l

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: sets scale studien la ((filosofia a) OR (filosofia de)) literature*.