Perhaps you should try some spelling variations:
"estudios humanos desde." » "estudios urbanos desde.", "estudios peruanos desde.", "estudios humanisticos desde.", "estudios humanos de."
"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.

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