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