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