Why can't BeautifulSoup extract tags from html?

Question

beautiful soup

BeautifulSoup pulls everything up to a certain point. On one page, he needs to find a div with the class part_box, and he finds them, but he cannot find the content tags in these divs. Code div class part_box below:

<div class="part_box">
<div class="part_brand" style="display:none;">QUINTON HAZELL</div>
<div class="part_article_id" style="display:none;">QBK395</div>
<div class="part_name pointer" onclick="document.location.href = '/part/qbk395/quinton_hazell/'; return false;">
                                Комплект ГРМ на Acura Legend: <span class="part_article">QUINTON HAZELL QBK395</span>
</div>
<div class="pointer part-box-image-wrapper" onclick="document.location.href = '/part/qbk395/quinton_hazell/'; return false;">
<div class="part_img">
<a class="pointer" href="/part/qbk395/quinton_hazell/">
<img alt="Комплект ГРМ QUINTON HAZELL QBK395" class="lazyload" data-src="https://static.ukrparts.com.ua/media/images/57/00572281703255.jpg" t
itle="Комплект ГРМ QUINTON HAZELL QBK395" width=""/>
</a>
</div>
</div>
<div class="part_footer">
<div class="price_and_buy">
<div class="pull-right" style="padding-bottom: 10px;">
<span class="weight-medium">Скоро будет</span>
</div>
<div class="clearfix"></div>
<div class="danger"></div>
</div>
<div class="part_info">
<ul>
<li><span class="weight-medium">входящие в состав ролики</span>: 1</li> </ul>
</div>
</div>
</div>

This is what it gets from each div with class part_box, but nested elements it can't parse. Why and how to solve it?