Perhaps you should try some spelling variations:
space studied » spaces studied, space studies, shape studied
state studied » state studies, have studied, state study
de literatura » de litterature, la literatura, y literatura
filosofia de » filosofia del
e filosofia » la filosofia

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: "tests ((space studied) OR (state studied)) e filosofia de literatura".
• Adding a wildcard symbol may retrieve word variants: tests ((space studied) OR (state studied)) e filosofia de literatura*.