Perhaps you should try some spelling variations:
"estudios humanisticos desde." » "estudios linguisticos desde.", "estudios humanisticos serie.", "estudios humanisticas de.", "estudios humanisticos en."
"estudios peruanos de." » "estudios urbanos de.", "estudios americanos de.", "estudios ensayos de.", "estudios peruano de.", "estudios peruana de.", "estudios peruanos y."
"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.

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