Perhaps you should try some spelling variations:
del litterature » de litterature, des litteratures, et litterature
comte studien » erste studien
die filosofia » di filosofia, de filosofia, e filosofia
code studien » code studies, die studien, code rstudio

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 ((code studien) OR (comte studien)) die filosofia del litterature".
• Adding a wildcard symbol may retrieve word variants: text ((code studien) OR (comte studien)) die filosofia del litterature*.