Perhaps you should try some spelling variations:
cities space » cities state, cities impact, cities places
y literatura » la literatura
e filosofia » la filosofia
filosofia y » filosofia e, filosofia _, filosofia de
its space » its spaces, its splice
studied e » studied _, studied 3, studied 5

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: ((its space) OR (cities space)) studied e filosofia y literatura.
• Adding a wildcard symbol may retrieve word variants: ((its space) or (cities space)) studied e filosofia y literatura*.