How to display reference nodes with child terms ?

I haven't used TVI module but if you created views then you can see the contextual filter in Advance tab. It has "Has taxonomy term ID (with depth)" field which will filter result with the child(n) level of the data.

Note: Make sure if view created as taxonomy than you have to add the relationship of node "Representative node". After adding this field you will see the above field.

I have attached snap of that field here