Your help documentation is a reflection of your product and brand. Easy to follow documentation leads to less customer effort, turning users into product experts and ultimately brand advocates.
Why your structure should be your priority
By the time your users interact with your search function, they are already spending extra effort to find their answer. To keep your users engaged on your site, provide intuitive navigation. Search is only one part of the equation when customers are trying to self-serve and your content structure is more important.
Using search is still a request for help. Instead of focusing solely on your site's search function, focus on your content structure.