Selecting child node from Wintree object

Hi ,

I want to automate a scenario using UFT 11.5(windows app), where i need to expand a parent node and to expand one of the child nodes and then select all the items under child nodes. Problem is that the items are not static. They will be updated . When i spy on the child node, it's property "all items" has the whole hierarchy ,eg root;Child node 1;root;child node 2 .Is there any way to select only the items under child node 1...Please see screen shot for reference..thanks

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