Article in English: You can add a little more or less salt to taste if you desire. Mix it in with your fingers, working with a handful of flour at a time. Keep mixing until all of the flour is coated with fat and a dough has begun to form. It should still be quite dry and flaky. Use your finger to work the water into the dough to loosen it up. The consistency should be soft and pliable, but not wet. Add more water if necessary. Put the dough on a clean surface and knead it with your hands for about 4 minutes, until it is smooth and slightly shiny. Form it into the shape of a ball. Cover it with plastic wrap. Let it rest on the counter while you make the filling. This will help the dough achieve a better texture.

Summary in Vietnamese:
Rây bột với muối vào 1 tô lớn. Thêm dầu ăn hoặc bơ vào phần bột trên. Cho 5 thìa cà phê nước lọc vào bột. Nhấc khối bột ra khỏi tô và nhào bột. Để bột nghỉ trong 30 phút.