Perhaps you should try some spelling variations:
del literatura » de literatura, pela literatura, da literatura
space studied » spaces studied, space studies, state studied
de filosofia » e filosofia, la filosofia, a filosofia
di filosofia » la filosofia, e filosofia
test space » cost space, dust space, fast space

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: "test space studied ((de filosofia) OR (di filosofia)) del literatura*".