Perhaps you should try some spelling variations:
"series estudioss urbano." » "series estudios urbanos.", "series estudio urbano.", "seis estudios urbano.", "serie estudio urbano.", "serie estudos urbano.", "seis estudioss urbano.", "tres estudioss urbano.", "leyes estudioss urbano."
"series estudios urbano." » "seis estudios urbano.", "tres estudios urbano.", "leyes estudios urbano.", "series estudios urbanos.", "series estudio urbano.", "series estudios peruanos."
"serie estudios urbano." » "serie estudios urbanos.", "serie estudio urbano.", "serie estudios peruanos."

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 urbano.") OR ("serie estudios urbano."))) or ("series estudioss urbano."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("series estudios urbano.") OR ("serie estudios urbano."))) OR ("series estudioss urbano.")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"series estudios urbano.\") OR (\"serie estudios urbano.\"))) or (\"series estudioss urbano.\"))".
• Removing quotes may allow a broader search: (((( series estudios urbano. ) OR ( serie estudios urbano. ))) or ( series estudioss urbano. )).
• Adding a wildcard symbol may retrieve word variants: (((("series estudios urbano.") OR ("serie estudios urbano."))) or ("series estudioss urbano."))*.