$args = array( 'post_type' => 'amy_movie', 'tax_query' => array( 'relation' => 'OR', array( 'taxonomy' => 'amy_director', 'field' => 'term_id', 'terms' => $term_id, ), array( 'taxonomy' => 'amy_actor', 'field' => 'term_id', 'terms' => $term_id, ), array( 'taxonomy' => 'amy_singer', 'field' => 'term_id', 'terms' => $term_id, ), ),