Hierarchy view in Marketing Calendar

Dear experts,

We have a Marketing Plan and below this we have one or more Trade Promotions.

But when we are searching M-Plan and TP in Marketing Calendar, we are not getting any hierarchy view.

We are getting the search results in a scattered format.

I want that if M-Plan M1 has 3 promotions T1, T2 and T3 below it, then when I search in Marketing Calendar with the M-Plan, the 3 Trade Promotions should be shown below the M-Plan.

But as of now I am getting only the Marketing Plan in a single line but no TP is shown below it.

Any idea how this can be achieved?