First, read the English article below.

You might be frustrated that you are not able to grow a beard that is as full as you would like it to be. But the real problem might not be lack of growth, but lack of time. Beards can take up to four full weeks (and in some cases, even longer) to fully grow in. Many people give up before that time, and assume that they can't grow a full beard, when in reality, they gave up too soon.  Growing a beard is a project you need to commit to. Don't give up after several days! If after four or five weeks you still don't have results you're looking for, then it is time to try some alternative methods. Do not shave your facial hair at the first sign of itching. It is normal for new hairs to cause your skin to feel itchy, but as they get longer, they will soften, and the itching will stop.  Use an over-the-counter steroid cream like hydro-cortisone. This may help relieve some of the itching.  Waiting for hair to grow can be a frustrating experience, especially when your beard and mustache goes through a scraggly period, that may have people commenting. As your hair begins to grow in, it may seem patchy and incomplete. However, as the hairs become longer, the slower-growing follicles will have time to sprout their own hairs. Gradually, the patchy gaps will eventually be hidden, both by longer hairs and the slower, shorter hairs growing in as well. Let your hair do its thing. This means that you should not try to shape it too early in the growth process. When shaping facial hair, it is a common mistake to take off more than the intended amount. For this reason, it's best to just leave it alone while you are growing it out. Don't worry, there will be plenty of time for you to style it later, after you're happy with the growth.  As your hair grows, comb it in the direction you want it to grow. This will help it turn out looking the way you want. After about four weeks, you might want to have a barber or stylist do some professional shaping. Carefully explain that you are growing out your facial hair, and you just want... 

Now, please write a short abstract for it in Vietnamese. Abstract:
Kiên nhẫn chờ râu mọc. Để râu mọc tự nhiên. Sử dụng dầu dưỡng râu. Sử dụng thực phẩm chức năng.