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."
"los estudios urbano." » "los estudios urbanos.", "los estudio urbano.", "los estudios peruanos."
"reales estudio urbanos." » "reales estudios urbanos.", "reales estudio urbano.", "reales estudios peruanos.", "senales estudio urbanos.", "redes estudio urbanos."

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 ("los estudios urbano."))) or ("reales estudio urbanos."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("series estudios peruanoss.") OR ("los estudios urbano."))) OR ("reales estudio urbanos.")).
• Removing quotes may allow a broader search: (((( series estudios peruanoss. ) or ( los estudios urbano. ))) or ( reales estudio urbanos. )).
• Adding a wildcard symbol may retrieve word variants: (((("series estudios peruanoss.") or ("los estudios urbano."))) or ("reales estudio urbanos."))*.