Perhaps you should try some spelling variations:
"series estudioss peruanoss." » "series estudios peruanos.", "serie estudios peruanoss.", "seis estudios peruanoss.", "serie estudio 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 estudio urbano.", "series estudios peruanos."
"serie studias urbano." » "serie estudios urbanos.", "serie estudio urbano.", "serie studia urbano.", "serie estudios urbano.", "serie guias 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 ((("serie studias urbano.") or ("series estudios urbano."))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("series estudioss peruanoss.") OR ((("serie studias urbano.") OR ("series estudios urbano."))))*.
• Removing quotes may allow a broader search: (( series estudioss peruanoss. ) or ((( serie studias urbano. ) or ( series estudios urbano. ))))*.