Perhaps you should try some spelling variations:
"serie estudoss peruanoss." » "serie estudios peruanos.", "serie estudos peruanoss.", "serie estado peruanoss.", "serie estudio peruanoss."
"serie estudios urbano." » "serie estudio urbano.", "serie estudios peruanos.", "serie estudios hispano."
"series estudios urbanos." » "series estudio urbanos.", "series estudios peruanoss.", "series estudios hispanos.", "seis estudios urbanos.", "tres estudios urbanos.", "leyes 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 estudoss peruanoss.") or ("serie estudios urbano."))) or ("series estudios urbanos."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("serie estudoss peruanoss.") OR ("serie estudios urbano."))) OR ("series estudios urbanos.")).
• Removing quotes may allow a broader search: (((( serie estudoss peruanoss. ) or ( serie estudios urbano. ))) or ( series estudios urbanos. )).
• Adding a wildcard symbol may retrieve word variants: (((("serie estudoss peruanoss.") or ("serie estudios urbano."))) or ("series estudios urbanos."))*.