Perhaps you should try some spelling variations:
de litterature » la litterature, et litterature
filologia de » filologia e, fisiologia de, filosofia de
e filologia » de filologia, di filologia, e fisiologia
raths case » rates case, paths case, graphs case
rats case » rates case, rats causes, ratios case

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: "((rats case) OR (raths case)) studies e filologia de litterature".
• Adding a wildcard symbol may retrieve word variants: ((rats case) OR (raths case)) studies e filologia de litterature*.