If I understood correctly you can try this. Just insert each field as array line after ‘relation’ and when use wp_query loop.
$searchkey = 'yourwordhere';
$args = array(
'post_type'=> 'cpt_title',
'posts_per_page' => -1,
'meta_query' => array(
'relation' => 'OR',
array('key' => 'acf_field_name_here1','value' => $searchkey,'compare' => 'LIKE'),
array('key' => 'acf_field_name_here2','value' => $searchkey,'compare' => 'LIKE')
)
);
$wp_query = new WP_Query($args);
?>
