Perhaps you should try some spelling variations:
filosofia y » filosofia _, filosofia de, filosofia da
filosofia e » filosofia de, filosofia del
cost space » coset space, coset spaces
studie e » studie 2, studie _, studie 3
studie 1 » studie 2, studie _

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