Perhaps you should try some spelling variations:
filosofia da » filosofia de, filosofia del, filosofia della
sets scaled » sets scales, less scaled, sets khaled
filosofia e » filosofia de, filosofia del
sets scale » sets scales, set scale, sets stable
studien e » studien es, studien _, studien 3

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) OR (sets scaled)) studien e ((filosofia da) OR (filosofia e)) literature.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((sets scale) or (sets scaled)) studien e ((filosofia da) OR (filosofia e)) literature".
• Adding a wildcard symbol may retrieve word variants: ((sets scale) or (sets scaled)) studien e ((filosofia da) OR (filosofia e)) literature*.