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 mayo serie.", "estudios minor serie."
"estudios mas serie." » "estudios a serie.", "estudios de serie.", "estudios en serie.", "estudios mazas serie.", "estudios las series.", "estudios mayo 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 mas serie.") OR ("estudios maior serie."))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"estudios humanos serie.\") or (((\"estudios mas serie.\") OR (\"estudios maior serie.\"))))~".
• Removing quotes may allow a broader search: (( estudios humanos serie. ) or ((( estudios mas serie. ) OR ( estudios maior serie. ))))~.
• Adding a wildcard symbol may retrieve word variants: (("estudios humanos serie.") or ((("estudios mas serie.") OR ("estudios maior serie."))))*.