Perhaps you should try some spelling variations:
scale studies » scale study
de literatura » de litterature, la literatura, y literatura
ds filosofia » di filosofia, de filosofia, da filosofia
e literatura » y literatura, e literatur, a literatura
test scale » tests scale, best scale, rest scale

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 studies ds filosofia ((e literatura) OR (de literatura))".
• Adding a wildcard symbol may retrieve word variants: test scale studies ds filosofia ((e literatura) OR (de literatura))*.