Perhaps you should try some spelling variations:
"estudios americanos joan." » "estudios latinoamericanos joan.", "estudios americanos han.", "estudios americanos en.", "estudios americanos a."
"estudio linguistico desde." » "estudio linguistica desde.", "estudio linguisticas desde.", "estudio linguistico de."
"estudios las series." » "estudio las series.", "estudios mas series.", "estudios a series.", "estudios las sedes.", "estudios las especies."

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

• Performing a fuzzy search may retrieve terms with similar spellings: (((("estudios americanos joan.") or ("estudio linguistico desde."))) or ("estudios las series."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("estudios americanos joan.") OR ("estudio linguistico desde."))) OR ("estudios las series.")).
• Removing quotes may allow a broader search: (((( estudios americanos joan. ) or ( estudio linguistico desde. ))) or ( estudios las series. )).
• Adding a wildcard symbol may retrieve word variants: (((("estudios americanos joan.") or ("estudio linguistico desde."))) or ("estudios las series."))*.