Snippet 1

$tax_query = array(
	'relation' => 'AND',
	array(
		'taxonomy'         => 'genres',
		'terms'            => array( '1', '2', '3' ),
		'field'            => 'term_id',
	),
	array(
		'taxonomy'         => 'location',
		'terms'            => array( '4', '5', '6' ),
		'field'            => 'term_id',
	),
);