Perhaps you should try some spelling variations:
la litterature » a literature
die filosofia » di filosofia, de filosofia, e filosofia
filosofia la » filosofia da, filosofia le, filosofica da
studies die » studie die, studien die, studies does
text case » text class, text csv, context case
text code » text co
text copy » text copying

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: ((text case) OR (((text code) OR (text copy)))) studies die filosofia la litterature.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((text case) or (((text code) OR (text copy)))) studies die filosofia la litterature".
• Adding a wildcard symbol may retrieve word variants: ((text case) or (((text code) OR (text copy)))) studies die filosofia la litterature*.