Advanced Search > Auto-complete Settings

Enable Search auto-completer: This setting will start giving suggestions as your visitor start searching:

Auto-submit the form on select a Search option: If this option is selected, the search form will automatically load the detail page of the listing selected.

Min chars needed to trigger autocomplete: Enter a number of characters here before the auto-completer search is triggered.

Max Results to be returned by autocomplete: Enter a number here to limit the number of listings presented by the auto-completer.