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 class » text case
text code » text copy, text co, text case

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 class) OR (text code)) studies die filosofia la litterature.
• Adding a wildcard symbol may retrieve word variants: ((text class) or (text code)) studies die filosofia la litterature*.