szszb – tax-query

$tax_query = array(
	'relation' => 'AND',
	array(
		'taxonomy'         => 'telephely',
		'terms'            => 'nyiregy',
		'field'            => 'slug',
		'operator'         => 'IN',
		'include_children' => true,
	),
	array(
		'taxonomy'         => 'osztaly',
		'terms'            => 'belgy',
		'field'            => 'slug',
		'operator'         => 'IN',
		'include_children' => true,
	),
);