Service s & Sectors

$meta_query = array(
	'relation' => 'AND',
	array(
		'key'     => 'services_tag',
		'value'   => '$_POST['service']',
		'compare' => 'LIKE',
	),
	array(
		'key'     => 'services_tag',
		'value'   => 'a',
		'compare' => 'LIKE',
	),
);