Activated charcoal is useful for removing bad smells, bacteria, pollutants, and allergens from air and water. It works by trapping odors, toxins, bacteria, pollutants, allergens, and chemicals into the numerous tiny pores within the charcoal. Wrap some activated charcoal in a linen sheet or cloth, then place the charcoal wherever it’s needed. If you don’t have linen, choose a tight-weave breathable fabric, like cotton.  Avoid using fabric that has a detergent or bleach smell. The charcoal will absorb these smells, too, decreasing its effectiveness. For improved air purification, position a fan so it blows air over the charcoal. As air passes over the charcoal, it will be purified. Store bought water filters can be expensive, but you can achieve the same water purity inexpensively by making your own water filter. Take a clean sock that doesn’t smell of detergent or bleach, insert the activated charcoal, and clean water by pouring it through the sock. In a small mixing bowl, combine 2 tablespoons (30 ml) of bentonite clay, 1⁄2 teaspoon (2.5 ml) of activated charcoal, 1 tablespoon (15 ml) of turmeric, 2 tablespoons (30 ml) of apple cider vinegar, and 1 teaspoon (4.9 ml) of honey. Then add water a little at a time to the mixture until it is smooth.  This masque is known for pulling out toxins and unclogging pores. The natural ingredients used in this masque will be safe for nearly all skin types. Apply the masque in a thick layer to your face for 10 minutes, then rinse it away. Add 500 milligrams (0.02 oz) of powdered activated charcoal to 12 fluid ounces (350 ml) of water. Drink this mixture before gas producing meals or when you start feeling gassy and bloated to alleviate the symptoms. Taking charcoal with non-acidic juice (like carrot) will be more pleasant than taking it plain. Avoid acidic juices (such as orange or apple juice) which will make the charcoal less effective.

How would you rephrase that briefly using Vietnamese?
Hiểu cách hoạt động của than hoạt tính. Lọc không khí trong nhà. Dùng tất làm bộ lọc nước bằng than hoạt tính. Làm mặt nạ đất sét- than hoạt tính. Trị đầy hơi và trướng bụng bằng than hoạt tính.