Show subcategory name selected in specific category woocoommerce

To display only assigned category you need to change hide_empty to true.

Please see the modified code:

$args = array(
 'hierarchical' => 1,
 'show_option_none' => '',
 'hide_empty' => true,
 'parent' => 134,
 'taxonomy' => 'product_cat'
);
$subcats = get_categories($args);
echo '<ul class="wooc_sclist">';
foreach ($subcats as $sc) {
$link = get_term_link( $sc->slug, $sc->taxonomy );
  echo '<li><a href="'. $link .'">'.$sc->name.'</a></li>';
}
echo '</ul>';

Please see the updated code:

$cats_list = get_the_terms ( get_the_ID() , 'product_cat' );

echo '<ul class="wooc_sclist">';
foreach ($cats_list as $cats) {
$link = get_term_link( $cats->slug, $cats->taxonomy );
echo '<li><a href="'. $link .'">'.$cats->name.'</a></li>';
}
echo '</ul>';