Query Posts multiple conditions

Try to use WP_Query as stated in this answer When should you use WP_Query vs query_posts() vs get_posts()?.

$user_bids = array(
    'post_type' => 'post',
    'meta_query' => array(
        'relation' => 'OR',
           array(
            'key' => 'duplicated',
            'value' => '0',
            'type' => 'numeric',
            'compare' => '='
           ),
           array(
            'key' => 'accept',
            'value' => '1',
            'type' => 'numeric',
            'compare' => '='
           )
         )
      );
$query = new WP_Query( $user_bids );