Perhaps you should try some spelling variations:
la literatura » la litterature, a literature
scale studies » case studies, scale study
de filosofia » e filosofia, di filosofia, la filosofia
a literatura » a literature, y literatura, a literatur
sets scale » sets scaled, sets scales, set 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: "sets scale studies de filosofia ((a literatura) OR (la literatura))".
• Adding a wildcard symbol may retrieve word variants: sets scale studies de filosofia ((a literatura) OR (la literatura))*.