Perhaps you should try some spelling variations:
scale studien » scale studies, scale student, duale studien
filosofia da » filosofia del, filosofia e, filosofia della
filosofia de » filosofia del
tests scale » tests stable, sets scale, tests safe
studien di » studien die, studien dd, studien der

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: "tests scale studien di ((filosofia da) OR (filosofia de)) literatura".
• Adding a wildcard symbol may retrieve word variants: tests scale studien di ((filosofia da) OR (filosofia de)) literatura*.