Multiple selection for Product hierarchy in search help screen

Hi Expert,

I've create a elementary search help which contains PRODH as condition.

I see multiple selection shown in standard search help MAT1P  for this field.

But it does not work in my case.

I've tried to bind this field to MVKE-PRODH / MARA-PRADH. Still failed to add the multiple selection.

Does anyone knows any solution?

Any suggestion will apriciated.

Thanks & Regards

Eric