Perhaps you should try some spelling variations:
la litterature » a literature
cases studies » case studies, games studies
la literatura » a literature
assets cases » assets case, assets clauses, assets based
de filosofia » e filosofia, di filosofia, la filosofia
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: "assets cases studies de filosofia ((la literatura) OR (la litterature))*".