noes query

// WP_Query arguments
$args = array(
	'post_parent'            => '$post->ID',
	'post_type'              => array( 'page' ),
	'post_status'            => array( 'publish' ),
	'has_password'           => false,
	'nopaging'               => true,
	'posts_per_page'         => '-1',
	'order'                  => 'DESC',
	'orderby'                => 'title',
	'meta_query'             => array(
		'relation' => 'AND',
		array(
			'key'     => 'area',
			'value'   => '$area',
			'compare' => '=',
		),
		array(
			'key'     => 'volumen',
			'value'   => '$vol',
			'compare' => '=',
		),
		array(
			'key'     => 'tipos',
			'value'   => '$tip',
			'compare' => '=',
		),
		array(
			'key'     => 'modalidad',
			'value'   => '$mod',
			'compare' => '=',
		),
		array(
			'key'     => 'audiencia',
			'value'   => '$aud',
			'compare' => '=',
		),
	),
);

// The Query
$list_pages = new WP_Query( $args );