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

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("estudios humanos serie.") OR ("estudios humanas serie."))) or ("estudios mas serie."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("estudios humanos serie.") OR ("estudios humanas serie."))) OR ("estudios mas serie."))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"estudios humanos serie.\") OR (\"estudios humanas serie.\"))) or (\"estudios mas serie.\"))*".
• Removing quotes may allow a broader search: (((( estudios humanos serie. ) OR ( estudios humanas serie. ))) or ( estudios mas serie. ))*.