Perhaps you should try some spelling variations:
1 filosofico » y filosofico, y filosoficos, e filosofica
a literatura » la literatura, a literature, a literatur
y literatura » la literatura
test via » test vdat, test von
studie 1 » studie 2, studie _
test v » test 2, test 1, test von

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 via) OR (test v)) studie 1 filosofico ((a literatura) OR (y literatura)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((test via) or (test v)) studie 1 filosofico ((a literatura) OR (y literatura))".
• Adding a wildcard symbol may retrieve word variants: ((test via) or (test v)) studie 1 filosofico ((a literatura) OR (y literatura))*.