Perhaps you should try some spelling variations:
"series estudios peruanoss." » "series estudios peruanos.", "series estudios urbanos.", "serie estudios peruanoss.", "seis estudios peruanoss.", "tres estudios peruanoss."
"series estudios urbano." » "serie estudios urbano.", "seis estudios urbano.", "tres estudios urbano.", "series estudios urbanos.", "series estudio urbano.", "series estudios peruanos."
"seire estudios urbano." » "seire estudios urbanos.", "seire estudio urbano.", "seire estudios peruanos.", "serie estudios urbano.", "seis estudios urbano.", "sobre 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: (((("series estudios peruanoss.") OR ("seire estudios urbano."))) OR ("series estudios urbano."))~.
• Removing quotes may allow a broader search: (((( series estudios peruanoss. ) or ( seire estudios urbano. ))) or ( series estudios urbano. ))~.
• Adding a wildcard symbol may retrieve word variants: (((("series estudios peruanoss.") or ("seire estudios urbano."))) or ("series estudios urbano."))*.