Place the skillet on a burner and turn the heat to medium high. Let the butter melt completely and make sure the pan gets very hot.  Don't use a nonstick skillet to make an omelette using this technique. The high heat can cause the nonstick coating to flake off. This method works best with just 2 eggs, but you could add a third if you're quite hungry. Be sure the pan is very hot first; the butter should be sizzling. As soon as the eggs hit the pan they will begin to bubble and cook. Stay close by, since the eggs cook very quickly when you use this technique. Cook the first side for 30 seconds. After the second side has cooked for about 20 seconds, slide the omelette onto a plate and use the lip of the pan to fold it over. This quick technique turns out simple, flavorful, perfectly cooked omelettes.

TL;DR in Vietnamese:
Đun nóng một chút bơ trên chảo nhỏ bằng kim loại. Đổ trứng vào chảo. Cho trứng ra đĩa.