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

Try widening your search to All Fields.

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

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