Perhaps you should try some spelling variations:
der filosofica » de filosofia, e filosofica, e filosofia
la literatura » la litterature, a literature
a literatura » a literature, y literatura, a literatur
des studien » das studien, des studie, die studien
studien der » studie der, studenten der
fest des » test des, fest der, fest oder

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: fest des studien der filosofica ((a literatura) OR (la literatura)).
• Adding a wildcard symbol may retrieve word variants: fest des studien der filosofica ((a literatura) or (la literatura))*.