Perhaps you should try some spelling variations:
la litterature » a literature
studiums der » studium der, studium des
studiums des » studium des, studium der, studiums aus
filosofia la » filosofia da, filosofia le, filosofica da
test des » test der, test test

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 des ((studiums der) OR (studiums des)) filosofia la litterature.
• Adding a wildcard symbol may retrieve word variants: test des ((studiums der) or (studiums des)) filosofia la litterature*.