Perhaps you should try some spelling variations:
der filosofia » de filosofia, e filosofia, di filosofia
y literatura » la literatura
tests scale » tests stable, tests safe, tests shall
filosofia y » filosofia e, filosofia _, filosofia de
sets scale » sets scaled, sets scales, set scale
studie der » studium 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) OR (sets scale)) studie der filosofia y literatura".
• Adding a wildcard symbol may retrieve word variants: ((tests scale) OR (sets scale)) studie der filosofia y literatura*.