Is there a shortcut to move to the item being highlighted by the search help?
If you slowly move the mouse horizontally to the menu item that is highlighted, the menu will stay open.  

You are, most likely, having trouble with highlighting another choice on your way to the menu item of interest.  Don't let your mouse leave the highlighted row while traversing to the open menu and you should not have any problems.

This works this way on OS X 10.8.5.