Perhaps you should try some spelling variations:
et litterature » la litterature, art literature
die filosofia » di filosofia, e filosofia, da filosofia
case studies » case study
de filosofia » e filosofia, di filosofia, la filosofia
text case » text class, text code, context case

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