Perhaps you should try some spelling variations:
"serie estudios peruanoss." » "serie estudios peruanos.", "serie estudios urbanos.", "series estudioss peruanoss.", "serie studias peruanoss.", "serie estados peruanoss."
"serie estudio urbano." » "serie estudios urbano.", "serie estudios urbanos.", "serie espacio urbano.", "series estudios urbano.", "serie studia urbano.", "serie estado urbano."
"serie guias urbano." » "serie guia urbana.", "serie aguilar urbano."

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 guias urbano.") or ("serie estudio urbano."))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("serie estudios peruanoss.") OR ((("serie guias urbano.") OR ("serie estudio urbano.")))).
• Removing quotes may allow a broader search: (( serie estudios peruanoss. ) or ((( serie guias urbano. ) or ( serie estudio urbano. )))).
• Adding a wildcard symbol may retrieve word variants: (("serie estudios peruanoss.") or ((("serie guias urbano.") or ("serie estudio urbano."))))*.