You can,

if you are brewing Vietnamese coffee,milk added is the best.For regular black coffee, adding cream balls is optimal.For espresso, pure milk is the best.I served it this way to my guests when I made it,

but you can adjust according to your personal preference.

Since condensed milk makes it sweet.milk is the best.it is given to my guests when I make it.

but you can also follow your personal taste.

since condensed milk is sweet.

Because condensed milk is sweet.