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 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."

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