Perhaps you should try some spelling variations:
"estudios humanistico en." » "estudios humanisticos en.", "estudios mecanisticos en.", "estilo humanistico en.", "estudios humanistica en.", "estudios humanaistica en."
"estudios las especies." » "estudios mas especies.", "estudios a especies.", "estudios laura especies.", "estudios de especies."
"estudio las series." » "estudio la series.", "estudiar las series.", "estudio a series.", "estudio las sedes."

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (("estudios humanistico en.") OR ((("estudios las especies.") OR ("estudio las series."))))~.
• Removing quotes may allow a broader search: (( estudios humanistico en. ) or ((( estudios las especies. ) or ( estudio las series. ))))~.
• Adding a wildcard symbol may retrieve word variants: (("estudios humanistico en.") or ((("estudios las especies.") or ("estudio las series."))))*.