For what reasons google might not index the page?

Is there a website with ads. Somehow Google indexes only the main page and all, while Yandex much more.
In the robot txt and htaccess nothing forbidding there.
"Bane" of the website not.

UPD: url vdo.org.ua
July 4th 19 at 22:47
2 answers
July 4th 19 at 22:49
Look in the webmaster from Google
what is there to see? - eveline.Dicki commented on July 4th 19 at 22:52
: on the indexing error and in General all that you would say Google panel - marilyne_Roh commented on July 4th 19 at 22:55
July 4th 19 at 22:51
so you have no internal links. how does a robot it will be held?
<strong class="102"> 
<span class="sub_subcategimg"><img src="http://vdo.org.ua/.../102.png"></span>
<span class="title_sub">Children clothing</span></strong>
well, there is the below "Topics" - eveline.Dicki commented on July 4th 19 at 22:54

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