Perhaps you should try some spelling variations:
"bibliotecarios escolares" » "bibliotecas escolares", "bibliotecarios cuales", "biblioteca escolar"
"bibliotecas escolar" » "biblioteca escolar", "bibliotecas escolares"
"bibliotecarios que" » "bibliotecaria que", "bibliotecarios en", "bibliotecarios 235"
"bibliotecarios de" » "bibliotecarios en", "bibliotecarios 81", "bibliotecarios _"

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

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