Perhaps you should try some spelling variations:
"dos estudios peruanoss." » "dos estudios peruanos.", "dos estudios urbanos.", "los estudios peruanoss."
"series estudio urbanos." » "series estudios urbanos.", "series estudio urbano.", "series estudios peruanos.", "serie estudio urbanos.", "serie estudios urbanos.", "senales estudio urbanos."
"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."

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

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