How to make the parent post

You can’t get parent posts, but you can get parent pages.

Try creating them as pages instead.

and you know how to do it?
1-position itself https://www.hipstrumentals.com/2011/11/kid-ink-like-ag-instrumental-hook/
2-parent’s post https://www.hipstrumentals.com/2011/11/kid-ink-like-a-g-instrumental-hook/kid-ink-ft-travis-porter-like-a-g-instrumental/

Actually, as long as your theme supports custom menus, you can build a custom menu and have a menu hierarchy of posts, pages, categories, what ever you like.