如何在Datatable中搜索多个记录的'Child'数据？

This time, I am developing a Datatable with nested data, where inside the Child section, it has tables with list of the records. The problem now is, I cannot search data inside tables in the Child section.

Figure 1: Search records by keyword '2960' and it filtered parents records only

Figure 2: View Child data

Figure 3: How to search these data (yellow underscore)?

Question: Why the Parent [A] structure looks weird after clicked Child's plus icon?

I have already tried the solution provided by @davidkonrad in StackOverflow but failed. In that solution, it has a record only in each parent.

Referred: OP

Here is my code: jsfiddle

enter code here

I expect the search function working for data in the tables inside the Child section too. Please guide me, thank you.