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