Perhaps you should try some spelling variations:
"series estudioss urbano." » "series estudios urbano.", "serie estudios urbano.", "serie estudio urbano.", "series estudios urbanos.", "series estudio urbano."
"seis estudios urbano." » "seis estudios urbanos.", "seis estudio urbano.", "seis estudios peruanos.", "dos estudios urbano.", "dios estudios urbano.", "pons estudios urbano."
"los estudios urbano." » "los estudios urbanos.", "los estudio urbano.", "los estudios peruanos."

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