Changed the query and with the direction kaiser gave I got it working.
$area = $_GET['area'];
$persons = $_GET['persons'];
$query = new WP_Query( array( 'tag' => "$area+$persons" ) );
Changed the query and with the direction kaiser gave I got it working.
$area = $_GET['area'];
$persons = $_GET['persons'];
$query = new WP_Query( array( 'tag' => "$area+$persons" ) );