Article in English: If you have a top-loading machine, you can pour the vinegar directly into the drum, or you can add it to the fabric softener dispenser if you have a front-loading washer. The vinegar will help break up any detergent or minerals left behind by hard water, so your clothes will look brighter. The vinegar will also prevent this buildup in the first place, so it’s a great way to keep your clothes color-fast while they’re still new. Place your faded clothes into your washing machine, add laundry detergent, and turn on the machine. In many cases, soaking your clothes in vinegar then washing them is all it will take to get them looking brighter. Choose the cycle that’s appropriate for the clothes you’re brightening. For instance, if you’re washing items made from a delicate material like silk or lace, you’d want to use a gentle wash. For more durable fabrics like cotton or denim, a normal wash is fine. The vinegar will wash out of your clothing during the rinse cycle, so your laundry shouldn’t smell like vinegar when it comes out of the wash. You can either hang the clothes to dry or place them in the dryer, depending on the instructions on the care label or how you normally prefer to dry your clothes.  If a little of the smell does linger, either hang the item to dry outside or put a fabric softener sheet in the dryer. The smell should be gone by the time it's dry. If your clothes still look faded, the dye might have washed out, so you may need to dye the clothes instead.

Summary in Vietnamese:
Thêm ½ cốc (120 ml) giấm trắng vào máy giặt. Giặt quần áo với nước lạnh ở chế độ giặt thường. Phơi quần áo hoặc làm khô bằng máy sấy.