Perhaps you should try some spelling variations:
"alan guides for the busy librarians." » "plan guides for the busy librarians.", "alan guide for the busy librarians.", "alan guides for the bus librarians.", "alan guides for the buy librarians.", "alan guides for the bush librarians."
"alan guides for the bust libraries." » "plan guides for the bust libraries.", "alan guide for the bust libraries.", "alan guides for the best libraries.", "alan guides for the must libraries.", "alan guides for the just libraries."

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("alan guides for the busy librarians.") or ("alan guides for the bust libraries."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("alan guides for the busy librarians.") OR ("alan guides for the bust libraries.")).
• Removing quotes may allow a broader search: (( alan guides for the busy librarians. ) or ( alan guides for the bust libraries. )).
• Adding a wildcard symbol may retrieve word variants: (("alan guides for the busy librarians.") or ("alan guides for the bust libraries."))*.