Perhaps you should try some spelling variations:
"estudios humanas serie." » "estudios mas serie.", "estudios humanidades serie."
"estudios urbano desde." » "estudios urbanos desde.", "estudio urbano desde.", "estudios peruanos desde.", "estudios urbana desde.", "estudios urbano de.", "estudios urbano del."
"estudios enzo serie." » "estudios en serie.", "estudios e serie.", "estudios etnicos serie.", "estudios mentor serie.", "estudios genero serie."

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"estudios humanas serie.\") OR (\"estudios urbano desde.\"))) OR (\"estudios enzo serie.\"))~".
• Removing quotes may allow a broader search: (((( estudios humanas serie. ) OR ( estudios urbano desde. ))) OR ( estudios enzo serie. ))~.
• Adding a wildcard symbol may retrieve word variants: (((("estudios humanas serie.") OR ("estudios urbano desde."))) OR ("estudios enzo serie."))*.