Perhaps you should try some spelling variations:
la literatura » la litterature, a literature
rule studium » duale studium, schule studium, duales studium
de filosofia » e filosofia, di filosofia, la filosofia
e literatura » de literatura, y literatura, e literatur
studium de » studium der, studium des, studium die
test rule » test rules, tests rule, best rule

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: test rule studium de filosofia ((e literatura) OR (la literatura)).
• Adding a wildcard symbol may retrieve word variants: test rule studium de filosofia ((e literatura) or (la literatura))*.