Using Keywords as Category names

Hi,
I wish if someone would help me!

I’m using this plugin to search my posts. i use the search field where the user can enter keywords & a taxonomy filter.

<?php do_action( ‘facetious’, array(
‘submit’ => ‘Search’,
‘fields’ => array(
‘s’,
‘cardsTax’
)
) );?>

cardsTax is the name of my taxonomy.

is there anyway to take inputs to the search field ‘s’ as a category name?

i have more than 2000 category in my website so it is impossible to display them in a drop-down for users to filter search results.

So i’m thinking in auto-complete categories names in the ‘s’ field, but how to let the search know that it should take the ‘s’ input as a category and search for posts in the entered category and not taking it as a keyword!

Any ideas ?!

https://www.ads-software.com/plugins/facetious/