How to add filters?

I want to add to filter item with two item group. With one item is possible like this item_group:'Consumable'. I want to filter items by Item group as Consumable and Service .

How can i achieve this ??

please see the link for your Help
Filter Options in Select Field

@Syed_Arab_Al_Taibi Thanks for the reply. But i want like this :

I want to add filter there like this Item Group : Service, Consumable

How it is possible ??