taxonomy

$tax_query = array(
	'relation' => 'OR',
	array(
		'taxonomy'         => 'doctors-disease',
		'terms'            => '$_GET['mixed']',
		'field'            => 'name',
	),
	array(
		'taxonomy'         => 'doctors-category',
		'terms'            => '$_GET['mixed']',
		'field'            => 'name',
	),
);