How to import XML feed with grandchildren subgroup?

I have this xml feed ...

<products><product><manufacturer_name>2CARS</manufacturer_name><quantity>1081</quantity><price>2.25</price><ean13>8586017592520</ean13><reference>92520</reference><weight>0.01</weight><descriptions>    **<descriptions>**<description>LED Autožiarovka 2LED 12V 5050SMD T10, biela.</description><description_short>LED Autožiarovka</description_short><name>4CARS LED ŽIAROVKA 2LED 12V 5050SMD T10</name>    **</descriptions>**</descriptions><images><image>https://2cars.eu/upload/products-import/hd/92520_01.jpg</image></images><default_category><category_default_name>LED žiarovky</category_default_name></default_category><product_category_tree>Elektro a Hifi > Osvetlenie > LED žiarovky</product_category_tree><hmotnos__>0.0094</hmotnos__><balenie>2 ks</balenie><farba/></product><products>

... and this part of script ...

 {                    $product_description[] = array('product_id'        => $product_id,'lang_id'           => $lang_id,'name'              => (string) $product->name,'url'               => url( (string) $product->name ),'short_info'        => (string) $product->description_short,'description'       => (string) $product->description                    );                }

.. the result is:

can not be imported, I guess because the grandchildren subgroup is hidden to it, but how to let him know to use it.

Please, can anybody help me?