Perhaps you should try some spelling variations:
del literatura » de literatura, pela literatura, e literatura
scale studies » scale study
da literatura » la literatura, a literatura, de literatura
de filosofia » e filosofia, di filosofia, la filosofia
test scale » tests scale, best scale, rest scale
studies de » studies der, studies die, studies doe

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