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

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

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