Perhaps you should try some spelling variations:
"serie estudios peruanoss." » "serie estudios urbanos.", "serie estudios urbanoss.", "serie estudios americanoss.", "serie estudios ensayoss."
"serie estudios peruanos." » "serie estudios urbanos.", "serie estudios americanos.", "serie estudios ensayos."
"serie studia urbano." » "serie estudio urbano.", "serie estudios urbano.", "serie estudios urbanos."

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

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