Go to ‘Plugins’ – search for and install the ‘Smart WooCommerce Search‘ plugin if you don’t already have it installed.
Enable it for WooCommerce searches
Go to the new ‘Smart Search’ tab in your WordPress dashboard.
And within the second tab – WooCommerce default product search – ensure it is enabled and save.
It’s also worth ticking the Default Output on Search Page checkbox – this ensures that widgets such as the price filter work correctly on the search results.