Perhaps you should try some spelling variations:
"estudios humanisticos serie." » "estudios linguisticos serie.", "estudios humanistica series.", "estudios humanisticos sobre.", "estudios humanisticos en."
"estudios humanos desde." » "estudios urbanos desde.", "estudios peruanos desde.", "estudios ensayos desde.", "estudios humanos de."
"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 humanisticos serie."))) OR ("estudios las series."))~.
• Removing quotes may allow a broader search: (((( estudios humanos desde. ) or ( estudios humanisticos serie. ))) or ( estudios las series. ))~.
• Adding a wildcard symbol may retrieve word variants: (((("estudios humanos desde.") or ("estudios humanisticos serie."))) or ("estudios las series."))*.