Perhaps you should try some spelling variations:
de litterature » la litterature, et litterature
de filologia » di filologia, de filosofia, e fisiologia
filologia de » filologia e, fisiologia de, filosofia de
studies de » studies der, studies die, studies doe

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: (((rats OR rat) OR rate) OR rays) gavage studies de filologia de litterature.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(((rats OR rat) or rate) or rays) gavage studies de filologia de litterature".
• Adding a wildcard symbol may retrieve word variants: (((rats OR rat) or rate) or rays) gavage studies de filologia de litterature*.