Perhaps you should try some spelling variations:
"series estudios espanoles." » "series estudios espaciales.", "series estudiantes espanoles.", "series escritos espanoles.", "seis estudios espanoles.", "tres estudios espanoles.", "leyes estudios espanoles."
"series judios espanoles." » "series cuentos espanoles.", "series los espanoles.", "series judios espana.", "serie medios espanoles.", "erdei judios espanoles."
"serie estudios urbano." » "serie estudios urbanos.", "serie estudio urbano.", "serie 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: (("serie estudios urbano.") or ((("series estudios espanoles.") OR ("series judios espanoles."))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("serie estudios urbano.") OR ((("series estudios espanoles.") OR ("series judios espanoles."))))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"serie estudios urbano.\") or (((\"series estudios espanoles.\") OR (\"series judios espanoles.\"))))*".
• Removing quotes may allow a broader search: (( serie estudios urbano. ) or ((( series estudios espanoles. ) OR ( series judios espanoles. ))))*.