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 mas serie.", "estudios humanidades serie."
"estudios mazas serie." » "estudios mas serie.", "estudios maior serie.", "estudios marcial serie.", "estudios mezclas serie.", "estudios mazas fermin."

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 mazas serie."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("estudios humanos serie.") OR ("estudios humanas serie."))) OR ("estudios mazas serie."))*.
• Removing quotes may allow a broader search: (((( estudios humanos serie. ) or ( estudios humanas serie. ))) or ( estudios mazas serie. ))*.