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 maior serie." » "estudios marcial serie.", "estudios nativos serie.", "estudios maior series.", "estudios minor serie.", "estudios mentor serie."
"estudios mayo serie." » "estudios mas serie.", "estudios enzo serie.", "estudios a 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 mayo serie.") OR ("estudios maior serie."))))~.
• Removing quotes may allow a broader search: (( estudios humanos serie. ) or ((( estudios mayo serie. ) or ( estudios maior serie. ))))~.
• Adding a wildcard symbol may retrieve word variants: (("estudios humanos serie.") or ((("estudios mayo serie.") or ("estudios maior serie."))))*.