Perhaps you should try some spelling variations:
"estudios humanos serie." » "estudios urbanos serie.", "estudios peruanos serie.", "estudios humanisticos serie.", "estudios humanas serie."
"estudios humanos desde." » "estudios urbanos desde.", "estudios peruanos desde.", "estudios humanisticos desde.", "estudios humanos de."
"estudios mayo serie." » "estudios maior serie.", "estudios mas serie.", "estudios enzo serie."

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: (((("estudios humanos serie.") OR ("estudios humanos desde."))) OR ("estudios mayo serie."))~.
• Removing quotes may allow a broader search: (((( estudios humanos serie. ) or ( estudios humanos desde. ))) or ( estudios mayo serie. ))~.
• Adding a wildcard symbol may retrieve word variants: (((("estudios humanos serie.") or ("estudios humanos desde."))) or ("estudios mayo serie."))*.