Perhaps you should try some spelling variations:
la literatura » la litterature, a literature
y filosofico » y filosoficos, y filosofia, e filosofica
a literatura » a literature, y literatura, a literatur
du studie » zu studie, eu studies, zu studien
studie y » studie 2, studie _, studie 1
test du » test de, test d, test do

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 du studie y filosofico ((a literatura) OR (la literatura))".
• Adding a wildcard symbol may retrieve word variants: test du studie y filosofico ((a literatura) OR (la literatura))*.