Perhaps you should try some spelling variations:
"serie estudios peruanoss." » "serie estudios peruanos.", "serie estudios urbanos."
"serie estudos urbanos." » "serie estudios urbanos.", "serie estudio urbano.", "serie estudios peruanos.", "serie estado urbanos.", "serie estudio urbanos.", "serie studia urbanos."
"series estudios urbano." » "seis estudios urbano.", "tres estudios urbano.", "leyes estudios urbano.", "series estudios urbanos.", "series estudio urbano.", "series estudios peruanos."

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

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