Perhaps you should try some spelling variations:
del literatura » pela literatura, da literatura, e literatura
scale studies » scale study
de literatura » de litterature, la literatura, y literatura
test scale » tests scale, best scale, rest scale
studies la » studies lab, studies lca, studies lia

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 la filosofia ((del literatura) OR (de literatura))*".