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

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