Perhaps you should try some spelling variations:
"series estudios peruanoss." » "series estudios urbanos.", "series estudios urbanoss.", "series estudios americanoss.", "series estudios ensayoss.", "serie estudios peruanoss.", "seis estudios peruanoss.", "tres estudios peruanoss.", "serie estudioss peruanoss.", "senales estudios peruanoss."
"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."
"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: (((("series estudios peruanoss.") OR ("series estudios peruanos."))) or ("series estudio urbano."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("series estudios peruanoss.") OR ("series estudios peruanos."))) OR ("series estudio urbano.")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"series estudios peruanoss.\") OR (\"series estudios peruanos.\"))) or (\"series estudio urbano.\"))".
• Removing quotes may allow a broader search: (((( series estudios peruanoss. ) OR ( series estudios peruanos. ))) or ( series estudio urbano. )).
• Adding a wildcard symbol may retrieve word variants: (((("series estudios peruanoss.") OR ("series estudios peruanos."))) or ("series estudio urbano."))*.