Perhaps you should try some spelling variations:
"series estudios hispanos." » "series estudios hispanicos.", "series estudios espanoles.", "series estudios lesbianos.", "seis estudios hispanos.", "tres estudios hispanos.", "leyes estudios hispanos.", "series estudios hispanas.", "series estudios hispanics."
"serie estudios urbano." » "serie estudios urbanos.", "serie estudio urbano.", "serie estudios peruanos."
"series estudios hispano." » "seis estudios hispano.", "tres estudios hispano.", "leyes estudios hispano.", "series estudios hispana.", "series estudios hispanic."

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