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 mayo serie." » "estudios maior serie.", "estudios enzo serie.", "estudios a serie."
"estudios mas serie." » "estudios a serie.", "estudios maior serie.", "estudios de serie.", "estudios mazas serie.", "estudios las series.", "estudios das series."

Try widening your search to All Fields.

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 mas serie.") OR ("estudios mayo serie."))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("estudios humanos serie.") OR ((("estudios mas serie.") OR ("estudios mayo serie.")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"estudios humanos serie.\") or (((\"estudios mas serie.\") OR (\"estudios mayo serie.\"))))".
• Removing quotes may allow a broader search: (( estudios humanos serie. ) or ((( estudios mas serie. ) OR ( estudios mayo serie. )))).
• Adding a wildcard symbol may retrieve word variants: (("estudios humanos serie.") or ((("estudios mas serie.") OR ("estudios mayo serie."))))*.