Perhaps you should try some spelling variations:
filologia et » filologia e, filosofia e, fisiologia e
filologica e » filologia e, filologici e, filosofica e
rat gavage » rats gavage, oral gavage
studies di » studies die, studies div, studies ds

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: "rat gavage studies di ((filologia et) OR (filologica e)) litterature".
• Adding a wildcard symbol may retrieve word variants: rat gavage studies di ((filologia et) OR (filologica e)) litterature*.