Perhaps you should try some spelling variations:
et litterature » la litterature, art literature
filologia et » filologia e, filologica e, filosofia e
studies die » studies does, studies dose, studies ds
studies de » studies der, studies doe, studies due
rats » rat

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