Perhaps you should try some spelling variations:
"bibliotecarios escolares" » "bibliotecas escolares"
"bibliotecarios cuales" » "bibliotecarios ala", "bibliotecarios que", "bibliotecarios con"
"biblioteca escolar" » "bibliotecas escolares"
"bibliotecarios en" » "bibliotecario en", "biblioteca josue", "biblioteca en"

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

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