Perhaps you should try some spelling variations:
scale studien » scale studies, scale student, duale studien
filosofia de » filosofia del
studien aus » studie aus
filosofia y » filosofia e, filosofia _, filosofia da

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: (testo OR tests) scale studien aus ((filosofia y) OR (filosofia de)) literatura.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(testo or tests) scale studien aus ((filosofia y) OR (filosofia de)) literatura".
• Adding a wildcard symbol may retrieve word variants: (testo or tests) scale studien aus ((filosofia y) OR (filosofia de)) literatura*.