First, read the English article below.

A lot of the time, there's nothing wrong with you or how you study or learn: your brain just can't hold the information because your body isn't getting something that it needs. Often, that need is more sleep. You'll want to be sure to get plenty of sleep if you want your brain to be alert enough to absorb information. Just drinking an extra cup of coffee isn't going to work. This means you'll want to stop doing those late night study sessions. Instead, go to bed early, get a few hours of sleep, and then get up early so that you can study more on a well-rested brain.  Studies have actually revealed that while we sleep, the brain is flushed with a fluid that cleans it of toxins. When we don't get enough sleep, our brains are so overloaded with junk that it becomes difficult for the brain to function correctly. How much is enough sleep really depends on you and how your body works. Seven to eight hours is what is recommended for most adults, but some people need less and some people need more. You should be able to feel awake and alert through most of the day, without the aid of coffee. If you're tired before four or five in the afternoon, then you're probably not getting enough sleep (or you might be getting too much). When you're hungry, your brain will have a really hard time absorbing any information. It's hard to focus when all your body can tell you is that your stomach is empty. Make sure that you get enough food for all of the major meals. You might even want to choose something healthy to snack on while you study as well as during any classes or tests you might have to take. It's also a good idea to make sure that you're eating healthy foods. Junk food doesn't give your body the nutrients it needs to perform at its best. Snack on some almonds or a couple of carrots in order to feel alert and focused, instead of bloated and tired. Your body is at its best when it's well hydrated. When you don't get enough water, you won't be able to focus. You can easily become distracted, whether you realize it or not,... 

Now, please write a short abstract for it in Vietnamese. Abstract:
Dành nhiều thời gian để ngủ. Ăn đầy đủ. Uống nhiều nước. Tập thể dục. Dạy bộ não biết cách học.