Perhaps you should try some spelling variations:
e litterature » et litterature, de litterature, en litterature
studies dose » studies ds, studies do, studies does
ratios game » ratios name, rating game, ratios age
studies doe » studies does, studies do, studies die
filologia e » filologica e, fisiologia e, filologici e

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: "ratios game ((studies doe) OR (studies dose)) filologia e litterature".
• Adding a wildcard symbol may retrieve word variants: ratios game ((studies doe) OR (studies dose)) filologia e litterature*.