Perhaps you should try some spelling variations:
la litterature » a literature
et litterature » art literature
die filosofia » di filosofia, de filosofia, e filosofia
case studies » case study
studies die » studie die, studien die, studies does
text case » text class, text code, text csv

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: "text case studies die filosofia ((et litterature) OR (la litterature))".
• Adding a wildcard symbol may retrieve word variants: text case studies die filosofia ((et litterature) OR (la litterature))*.