Go to Theme settings > Search
AJAX Live Search is a search form that displays the result as you type. It acts like the Google Search Autocomplete (Auto Suggest) feature. Therefore it makes it easier for the users to find what they are looking for. AJAX Live Search has been developed using PHP, JavaScript (jQuery), AJAX and MySQL.
If you want to customize the collections displayed, create a linklist menu called "List collections search".
Results:
Limit display product
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From The4
Hope you success!!