Perhaps you should try some spelling variations:
la litterature » a literature
le litterature » de litterature, le letterature, les litteratures
test studium » des studium, test studies, selbst studium
di filosofia » la filosofia, e filosofia
studium di » studium die, studium i, studium ii
test test » testing test

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: "test test studium di filosofia ((le litterature) OR (la litterature))*".