SNIP1

$tax_query = array(
	'relation' => 'AND',
	array(
		'taxonomy'         => 'promotype',
		'terms'            => '1',
		'field'            => 'term_id',
	),
	array(
		'taxonomy'         => 'promotype',
		'terms'            => '2',
		'field'            => 'term_id',
	),
);