Perhaps you should try some spelling variations:
la literatura » la litterature, a literature
e filosofico » e filosofica, y filosofico, e filosofiche
a literatura » a literature, y literatura, a literatur
die studie » eine studie
test die » test de, west die, test drive
studie e » studie 2, studie _, studie 1

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 die studie e filosofico ((a literatura) OR (la literatura)).
• Adding a wildcard symbol may retrieve word variants: test die studie e filosofico ((a literatura) or (la literatura))*.