This is not possible and I doubt, that this could be useful. If you browser – and read – the nodes, but you do not see, whether the read content is really in the open node or in one of the child notes, what should be the meaning of child nodes? Such a feature will easily lead to confusion, I vote against.
If you are unsure, if a content is in a parent or in a child node, use the function to search in current and child nodes.
Agreeing with Cosmo, let me suggest Export/Print to PDF using the awesome option: Selected Node and Subnodes where you will see the complete contents on a single document even splitted on different pages per node if you desire it.