WordPress custom loop with pagination

IF Fornt page:

Change:

<?php
  // set up or arguments for our custom query
  $paged = ( get_query_var('paged') ) ? get_query_var('paged') : 1;
  $query_args = array(
    'post_type' => 'sanpham',
    'posts_per_page' => 9,
    'paged' => $paged
  );
  // create a new instance of WP_Query
  $the_query = new WP_Query( $query_args );
?>

 To:

<?php
  // set up or arguments for our custom query
  $paged = ( get_query_var('page') ) ? get_query_var('page') : 1;
  $query_args = array(
    'post_type' => 'sanpham',
    'posts_per_page' => 9,
    'paged' => $paged
  );
  // create a new instance of WP_Query
  $the_query = new WP_Query( $query_args );
?>

http://web-profile.com.ua/wordpress/themes/wordpress-custom-loop/