Perhaps you should try some spelling variations:
"serie estudios peruanos." » "serie estudios americanos.", "serie estudios ensayos.", "serie estudios cervantinos."
"series estudioss hispano." » "series estudios hispano.", "series estudios hispanicos.", "series espacios hispano.", "seis estudios hispano.", "serie estudio hispano."
"serie estudios urbanos." » "serie estudios urbano."

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: (((("serie estudios peruanos.") OR ("series estudioss hispano."))) OR ("serie estudios urbanos."))~.
• Removing quotes may allow a broader search: (((( serie estudios peruanos. ) or ( series estudioss hispano. ))) or ( serie estudios urbanos. ))~.
• Adding a wildcard symbol may retrieve word variants: (((("serie estudios peruanos.") or ("series estudioss hispano."))) or ("serie estudios urbanos."))*.