Perhaps you should try some spelling variations:
"difusion del estudios" » "difusion de estudios", "difusion del estudio", "difusion diez estudios"
"difusion c estudios" » "difusion y estudios", "difusion 6 estudios", "difusion a estudios", "difusion g estudios", "difusion de estudios", "difusion en estudios"
"difusion h estudios" » "difusion y estudios", "difusion 6 estudios", "difusion a estudios", "difusion g estudios", "difusion hoy estudios", "difusion de estudios"

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("difusion del estudios") or ((("difusion c estudios") OR ("difusion h estudios"))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("difusion del estudios") OR ((("difusion c estudios") OR ("difusion h estudios")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"difusion del estudios\") or (((\"difusion c estudios\") OR (\"difusion h estudios\"))))".
• Removing quotes may allow a broader search: (( difusion del estudios ) or ((( difusion c estudios ) OR ( difusion h estudios )))).
• Adding a wildcard symbol may retrieve word variants: (("difusion del estudios") or ((("difusion c estudios") OR ("difusion h estudios"))))*.