search - Google does not index breadcrumb navigation -

i ask help. 5 months ago, added code on web:

<script type="application/ld+json">     {     "@context": "http://myweb.com",     "@type": "breadcrumblist",     "itemlistelement":     [     {     "@type": "listitem",     "position": 1,     "item":     {     "@id": "http://myweb.com",     "name": "myweb"     }     }                 ,{         "@type": "listitem",         "position": 2,         "item":         {         "@id": "http://myweb.com/adverts/cars",         "name": "cars"         }         }                     ]     } </script> 

but google still not showing breadcrumb navigation results on web. wrong? everyone.

change url on @context http://schema.org looks below

<script type="application/ld+json"> { "@context": "http://schema.org", "@type": "breadcrumblist", "itemlistelement": [ { "@type": "listitem", "position": 1, "item": { "@id": "http://myweb.com", "name": "myweb" } }             ,{     "@type": "listitem",     "position": 2,     "item":     {     "@id": "http://myweb.com/adverts/cars",     "name": "cars"     }     }                 ] } 

then validate using google's tool https://developers.google.com/structured-data/testing-tool/