Perhaps you should try some spelling variations:
del literatura » pela literatura, da literatura, e literatura
de litterature » la litterature, et litterature
scale studies » scale study
de literatura » la literatura, y literatura, a 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.

• If you are trying to use Boolean operators, they must be ALL CAPS: test scale studies la filosofia ((del literatura) OR (((de literatura) OR (de litterature))))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "test scale studies la filosofia ((del literatura) or (((de literatura) OR (de litterature))))*".