Perhaps you should try some spelling variations:
de literatura » de litterature, la literatura, y literatura
lia filosofia » la filosofia, alla filosofia, fija filosofia
filosofia de » filosofia del
tests scale » tests stable, sets scale, tests safe
test scale » best scale, rest scale, treat scale
study lia » study lila, study lis, study la

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: "((test scale) OR (tests scale)) study lia filosofia de literatura".
• Adding a wildcard symbol may retrieve word variants: ((test scale) OR (tests scale)) study lia filosofia de literatura*.