Perhaps you should try some spelling variations:
"estudios humanos desde." » "estudios peruanos desde.", "estudios humanisticos desde.", "estudios ensayos desde.", "estudios humanos de."
"estudios urbanos serie." » "estudios humanos serie."
"estudios a series." » "estudios e series.", "estudios d series.", "estudios _ series.", "estudios y series.", "estudios a serie.", "estudios las series."

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"estudios humanos desde.\") OR (\"estudios urbanos serie.\"))) OR (\"estudios a series.\"))~".
• Removing quotes may allow a broader search: (((( estudios humanos desde. ) OR ( estudios urbanos serie. ))) OR ( estudios a series. ))~.
• Adding a wildcard symbol may retrieve word variants: (((("estudios humanos desde.") OR ("estudios urbanos serie."))) OR ("estudios a series."))*.