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

Try widening your search to All Fields.

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

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