Perhaps you should try some spelling variations:
spaces studie » spaces studied, space studies, spaces state
spaces stable » spaces stability
e literatura » de literatura, y literatura, e literatur
a filosofia » la filosofia, e filosofia, di filosofia
filosofia e » filosofia de, filosofia del

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: "lit ((spaces studie) OR (spaces stable)) a filosofia e literatura".
• Adding a wildcard symbol may retrieve word variants: lit ((spaces studie) OR (spaces stable)) a filosofia e literatura*.