Perhaps you should try some spelling variations:
"serie estudios americanos." » "serie estudios latinoamericanos."
"serie estudios peruanos." » "serie estudios urbanos.", "serie estudios ensayos.", "serie estudios cervantinos."
"serie studias urbano." » "serie estudios urbano.", "serie estudios urbanos.", "serie estudio urbano.", "serie studia urbano.", "series estudios urbano.", "serie guias urbano."

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (("serie studias urbano.") or ((("serie estudios peruanos.") OR ("serie estudios americanos."))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("serie studias urbano.") OR ((("serie estudios peruanos.") OR ("serie estudios americanos."))))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"serie studias urbano.\") or (((\"serie estudios peruanos.\") OR (\"serie estudios americanos.\"))))*".
• Removing quotes may allow a broader search: (( serie studias urbano. ) or ((( serie estudios peruanos. ) OR ( serie estudios americanos. ))))*.