cannabjs on "[Help ]Query with wp_pagenavi?"

i use

query_posts(array(
   'post_type' 		=> 'san-pham',						                                                  'posts_per_page'	=> 8,
   'paged'				=> $paged,
   'order'				=> 'DESC',
   'tax_query' => array(										     array(																						'taxonomy' => 'nhom-hang',											'field' => 'slug',											'terms' => get_queried_object()->slug										)									)
)
);

pagenavi ok. But it does get post_per_page = 8 it only show 5 posts