Treatment for scabies involves getting rid of the infestation with prescription medications, which are called scabicides because they kill the mites.  There are currently no over the counter medications to treat scabies. Your doctor may prescribe you permethrin 5% cream, which is the drug of choice for the treatment of scabies.  It kills the scabies mites and eggs. The cream should be applied from the neck down over the entire body and washed off after eight to 14 hours.  Repeat the treatment in 7 days (1 week).  Side effects may include itching or stinging. You should talk to your doctor or pediatrician about treating infants and young children with scabies. Permethrin cream is safe for infants as young as 1 month old, but most experts recommend also applying it to the head and neck area for infants and young children. Make sure you can do so without getting it into your child's eyes or mouth. Crotamiton cream or lotion may also be prescribed to you. To use it, apply it from the neck down over the entire body after a bath.  Apply a second dose 24 hours after the initial dose and bathe 48 hours after the second dose. Repeat both doses in seven to 10 days. Crotamiton is considered safe when used as directed. However, frequent treatment failure has been reported with this scabicide, which means it isn't the most effective or widely used anymore. This lotion is similar to other scabicides. The lotion should be applied from the neck down over the entire body and washed off after eight to 12 hours in adults and after six hours in children. Repeat the treatment in seven days.  Lindane should not be given to children younger than two, women who are pregnant or nursing, or people with weakened immune systems. It is potentially neurotoxic, which means it can cause damage to the brain and other parts of the nervous system.  The prescription of lindane should be restricted to individuals who have failed treatment with or cannot tolerate other medications that pose less risk. There is one oral medication for scabies....

TL;DR in Vietnamese:
Sử dụng permethrin. Sử dụng kem hay dầu xoa chứa crotamiton 10%. Sử dụng dầu xoa chứa lindane 1%. Sử dụng ivermectin. Điều trị kích ứng da. Mua thuốc bôi steroid hay thuốc uống kháng histamin.