Perhaps you should try some spelling variations:
del filosofia » de filosofia, della filosofia, di filosofia
y literatura » la literatura
e filosofia » la filosofia
das studio » sas studio, das studium, casi studio
bist das » ist das, list das, geist das

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: "bist das studio ((del filosofia) OR (e filosofia)) y literatura".
• Adding a wildcard symbol may retrieve word variants: bist das studio ((del filosofia) OR (e filosofia)) y literatura*.