Perhaps you should try some spelling variations:
del literatura » de literatura, pela literatura, da literatura
die filosofia » di filosofia, de filosofia, e filosofia
testis acute » tests acute, testing acute, sepsis acute
versus acute » versus active, versus actual
studien die » studie die, studien der

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: ((testis acute) OR (versus acute)) studien die filosofia del literatura*.