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.", "serie estudioss peruanoss.", "senales estudios peruanoss."
"series estudios urbano." » "serie estudios urbano.", "seis estudios urbano.", "tres estudios urbano.", "series estudios urbanos.", "series estudio urbano.", "series estudios peruanos.", "serie estudioss urbano.", "senales estudios urbano."
"series estudio urbanos." » "series estudios urbanos.", "series estudio urbano.", "series estudios peruanos.", "serie estudio urbanos.", "serie estudios urbanos.", "senales estudio urbanos."

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

• Performing a fuzzy search may retrieve terms with similar spellings: (((("series estudios peruanoss.") or ("series estudio urbanos."))) or ("series estudios urbano."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("series estudios peruanoss.") OR ("series estudio urbanos."))) OR ("series estudios urbano."))*.
• Removing quotes may allow a broader search: (((( series estudios peruanoss. ) or ( series estudio urbanos. ))) or ( series estudios urbano. ))*.