First, read the English article below.

When milk freezes, it takes up a little more space that when it's liquid. If your milk's container is filled to the brim, this can cause it to burst in the freezer, making a huge frozen mess (this is especially true for hard glass jugs). Luckily, this is easy to prevent — just pour off about a cup of milk so that you have a few inches of room at the top of the container. Doing this gives the milk plenty of room to expand. On the other hand, if you've already drunk more than a cup or two of your milk, you can usually skip this step. Once you freeze your milk, the expiration date on the jug becomes basically meaningless unless you thaw it again right away. For this reason, it's a wise idea to label your container with both today's date and the number of days remaining before it expires. You can write this directly on the container with a marker, or, if you prefer not to mark your container, you can use a piece of masking tape as a label. For example, if it's August 24th and the milk expires on August 29th, we might label the container with the text "Frozen: Aug. 24 — five days to expire" so that we'll know how long we have to drink the milk when we thaw it in a month or two. You're all ready to freeze your milk — simply set your labeled container in a freezer with a temperature below 0o F/C. If you can't fit the entire container in the freezer, consider dividing the milk into several smaller containers. Within about a day, the milk should be frozen solid. When the milk is frozen, you may be able to see the separation of the milk and the fat. Don't worry — this is a normal part of the freezing process and is perfectly safe. Most sources recommend leaving your milk in the freezer for a maximum of either two or three months. Some sources even recommend freezing milk for up to six months. The general consensus seems to be that milk can last a very long time in the freezer but that it will gradually absorb the flavors and odors of other items in the freezer over time, becoming less appealing to drink. Note that... 

Now, please write a short abstract for it in Vietnamese. Abstract:
Chừa chỗ cho sữa nở ra. Ghi ngày cho hộp sữa. Cho hộp sữa vào trong tủ đông. Trữ sữa tối đa trong 2 tới 3 tháng. Bạn có thể trữ đông sữa trong khay đá.