It is recommended to bathe a Shih Tzu every three weeks. However, puppies may need to be bathed more frequently, since they can soil their bottoms when they defecate. Using high-quality shampoo and conditioner will help ensure that your puppy's coat and skin will be clean and remain healthy.  The variety of shampoos and conditioners from which to choose at your local pet store may be bewildering. To narrow your search, you can look for tearless, puppy-specific shampoos. Hypoallergenic shampoos are also good for puppies. They are free of detergents, fragrances, and additives that may be harsh on your puppy's skin. Good-quality hypoallergenic shampoos contain such ingredients as avocado, coconut oil, or lanolin. Conditioner has many benefits. It prevents hair breakage, seals the hair shaft (helps to keep out dirt and stains), and can prevent dry and itchy skin after a bath. Conditioner is especially useful in long-haired dogs like Shih Tzus. Spray conditioners are also available that can give your puppy's coat a nice sheen after bathing. The spray can also protect your puppy's coat from the sun and other outdoor elements, such as wind and dry air.  Leave-in conditioners are ideal for Shih Tzus. Conditioners that need to be rinsed out are usually not strong enough for Shih Tzu coats.  If your puppy has specific skin issues, your veterinarian can assist you in identifying which shampoo and conditioner would be best for your puppy. Human shampoos and conditioners have pHs that could irritate your puppy's skin, so do not use your own shampoo and conditioner to bathe the puppy, or grown dog. Other than shampoo and conditioner, you will need several other supplies: comb, brush, cotton balls, towels, washcloths, and a pet-specific blow dryer. The comb should be a double-sided stainless steel comb and will be used after he is dry. A bristle brush will be needed to brush him before the bath.  Canine bath brushes are available that are helpful in bathing puppies.  Pin brushes especially useful for Shih Tzus, given their...

How would you rephrase that briefly using Vietnamese?
Mua dầu gội và dầu xả chất lượng cao và an toàn dành cho thú cưng. Chuẩn bị dụng cụ tắm. Cho cún con làm quen với việc tắm rửa.