I try mute whitch the same item and dont work

How make that on chrome

You need to put the item in one box and an essence in the other. They have to be same tier; heavy weapons take 2 essences

I wanna mute 2item for get esence

You only mute 1 item to get an essence. Leave other box empty; and you can only mute items within range of your transmuting proficiency

Here you can find useful info about transmuting, or any of the other skills if you would be interested in starting an of them
https://forums.d2jsp.org/topic.php?t=71480454&f=272