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 las series." » "estudio las series.", "estudios mas series.", "estudios a series.", "estudios las sedes.", "estudios las especies."

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (((("estudios humanos desde.") OR ("estudios urbanos serie."))) OR ("estudios las series."))~.
• Removing quotes may allow a broader search: (((( estudios humanos desde. ) or ( estudios urbanos serie. ))) or ( estudios las series. ))~.
• Adding a wildcard symbol may retrieve word variants: (((("estudios humanos desde.") or ("estudios urbanos serie."))) or ("estudios las series."))*.