First, read the English article below.

You should always start by stopping certain things that make your breasts bigger naturally. The most common culprit will be birth control pills, which can add up to two cup sizes to your breasts! You'll have to talk to your doctor about non-hormone based alternatives.  A good alternative option to birth control pills is the copper IUD.  Pregnancy and breastfeeding are also natural causes of bigger breasts but you should not act against these states as they are natural and temporary. Calories are the fuel that our body uses and in order to burn fat (which is the main contributor to your bust line), you'll need to give it less fuel than it needs. This doesn't mean starving yourself, it just means balancing your activity level with the amount of fuel it needs. Lowering the amount of food you eat by a small amount while increasing your activity by a small amount can be enough to help you lose weight.  Use an online calorie calculator to find out how to adjust your diet. This calorie deficit should only be temporary. Once you've reached a healthy target weight, balance your calorie intake with your activity level. Maintaining a healthy diet is more important than losing fat around your bust. If you are already at a healthy overall weight, losing additional weight to make your breasts smaller would be unhealthy.  Maintaining a calorie deficit is only one factor involved in losing weight and excess fat. While this may have a limited short-term benefit, it's not the only thing that counts. You'll want to eat a healthier diet that puts your calorie intake to work for you! By eating few unhealthy items and increasing the nutritional value of the food that you do eat, you can make yourself feel more full with less food and easily decrease the number of calories you consume in a day.  Add healthy items to your diet. Eat healthy foods like kale, spinach, broccoli, quinoa, whole grain oatmeal, potatoes, lentils, edamame, white beans, fish, eggs, cottage cheese, and many other foods. Skip on fruits, which add a lot of sugar... 

Now, please write a short abstract for it in Vietnamese. Abstract:
Ngừng bất cứ việc gì khiến đôi gò bồng đảo to hơn. Tạo sự thiếu hụt calo (năng lượng nạp < năng lượng tiêu thụ). Ăn uống lành mạnh hơn. Chia khẩu phần ăn cân bằng. Luôn tích cực hoạt động trong cuộc sống hàng ngày. Tập thể dục hiệu quả. Duy trì động lực.