Perhaps you should try some spelling variations:
estudios humanos » estudios peruanos, estudios humanisticos, estudios ensayos
"estudios urbanos serie." » "estudios humanos serie."
"Estudios humanos desde." » "Estudios humanos ensde."
"Estudios humanos de." » "Estudios humanos en."

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