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."
"serret estado urbano." » "serie estado urbano.", "herrera estado urbano.", "serret estela urbano.", "serret estudio urbano.", "serret estado cubano.", "serret estudios urbano."

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 hispanos.") or ((("serret estado urbano.") or ("series estudios urbanos."))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("series estudios hispanos.") OR ((("serret estado urbano.") OR ("series estudios urbanos."))))*.
• Removing quotes may allow a broader search: (( series estudios hispanos. ) or ((( serret estado urbano. ) or ( series estudios urbanos. ))))*.