Using tax_query in get_terms

Question

i want to query my custom taxonomy which has a another custom taxonomy

 $tag_id=1;
$txy="channels";
    $args = array(
      'taxonomy' => 'series',
      'tax_query' => array(
        array(
        'taxonomy' => $txy,
        'field' => 'term_id',
        'terms' => $tag_id
         )
      )
    );

    $series =get_terms( $args );

but it seem to query everything