Perhaps you should try some spelling variations:
"alan guides for the busy librarians." » "alan guides for the busy librarian.", "alan guides for the usa librarians.", "alan guides for the gay librarians.", "ala guides for the busy librarians.", "plan guide for the busy librarians."
"plan guides for the bus libraries." » "plan guides for the bac libraries.", "plan guides for the busy librarian.", "plan guides for the _ libraries.", "plan guide for the bus libraries.", "ala guides for the bus libraries."

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"plan guides for the bus libraries.\") OR (\"alan guides for the busy librarians.\"))~".
• Removing quotes may allow a broader search: (( plan guides for the bus libraries. ) OR ( alan guides for the busy librarians. ))~.
• Adding a wildcard symbol may retrieve word variants: (("plan guides for the bus libraries.") OR ("alan guides for the busy librarians."))*.