Perhaps you should try some spelling variations:
la litterature » a literature
filosofia la » filosofia da, filosofia le, filosofica da
studies la » studies lab, studies lca, studies lia
rats » rate, 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 rays) gavage studies la filosofia la litterature.
• Adding a wildcard symbol may retrieve word variants: (rats or rays) gavage studies la filosofia la litterature*.