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