Perhaps you should try some spelling variations:
"serie estudio urbanos." » "serie estudio urbano.", "serie estudios urbano.", "serie estudios peruanos.", "serie estudios urbanos.", "serie studia urbanos.", "serie estado urbanos."
"series estudios urbanos." » "serie estudios urbanos.", "seis estudios urbanos.", "tres estudios urbanos."
"dos estudios urbanos." » "los 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: (((("series estudios urbanos.") or ("dos estudios urbanos."))) or ("serie estudio urbanos."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("series estudios urbanos.") OR ("dos estudios urbanos."))) OR ("serie estudio urbanos."))*.
• Removing quotes may allow a broader search: (((( series estudios urbanos. ) or ( dos estudios urbanos. ))) or ( serie estudio urbanos. ))*.