Perhaps you should try some spelling variations:
"series estudios hispanos." » "series estudios hispano.", "series estudios hispanicos.", "series estudios espanoles.", "serie estudios hispanos.", "seis estudios hispanos.", "tres estudios hispanos."
"series estudios urbanos." » "serie estudios urbanos.", "seis estudios urbanos.", "tres estudios urbanos.", "series estudio urbanos.", "series estudios peruanoss.", "series estudios hispanos."
"los estudios urbano." » "los estudio urbano.", "los estudios peruanos.", "los estudios hispano."

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