Perhaps you should try some spelling variations:
filologia et » filologia e, filologica e, fisiologia e
studies die » studie die, studien die, studies does
filosofia e » filosofia de, filosofia del
rat gavage » rats gavage, oral gavage

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: rat gavage studies die ((filologia et) OR (filosofia e)) litterature.
• Adding a wildcard symbol may retrieve word variants: rat gavage studies die ((filologia et) or (filosofia e)) litterature*.