The History... item displays a dialog box that includes
  a Title entry box and an area for displaying topic
  titles.

  To display a list of all help topics containing a
  specific word or phrase, enter the word or phrase in
  the Title entry box and click on the Apply button.

  You can view any of the topics that are displayed by
  double clicking on the topic or by single clicking
  on the topic and then clicking on the Go To or Visit
  button.