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

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