zentao/extension/ipd/doc/ext/config/zentaobiz.php

<?php
global $app;
if(!empty($app->user->feedback) or !empty($_COOKIE['feedbackView']))
{
    unset($config->doc->search['fields']['product']);
    unset($config->doc->search['fields']['execution']);
    unset($config->doc->search['params']['product']);
    unset($config->doc->search['params']['execution']);
}

$config->doc->notArticleType .= ',chapter';