This has been shown to reduce the incidence of developing a dry socket. Having the wound sutured by your oral surgeon may also prevent dry socket. This should be done immediately before and after surgery for best results.  Unscrew the cap and pour mouthwash into the cap. Dilute it with water so that it is 50% water and 50% mouthwash. Gently swish the mouthwash around in your mouth moving your tongue from one cheek to another. You may wish to concentrate your swishing efforts around the affected area. Spit out the mouthwash into the sink. Rinse your mouth out with water immediately afterward if the sting of mouthwash becomes too intense. This is especially important during the first 24 hours after surgery. Gradually move from soft foods to semi-soft foods as your wound heals, but it's generally best to avoid hard, chewy, crunchy, and spicy foods, as these are most prone to pooling in the socket and causing irritation or infection. If you're recovering from oral surgery, avoid smoking for at least 48 hours after the procedure. If you use chewing tobacco, avoid using it for at least one week after the procedure. Use of tobacco products may increase irritation, prolong the healing process, and leave wounds more susceptible to infection.

How would you rephrase that briefly using Vietnamese?
Để cho bác sĩ răng miệng bịt vết thương ngay sau khi phẫu thuật. Sử dụng nước súc miệng diệt khuẩn. Ăn thức ăn mềm. Tránh dùng thuốc lá.