Uống thật nhiều nước.

I'm interested in that, but I only have a few mins. Can you give me at most the first 500 characters of a detailed explanation in English about that?
The best thing to do for your achy vocal chords is to drink water. Nothing on the entire Earth is better for you than good ol' H2O. Keep it at room temperature to avoid shocking your throat with the freezing or burning liquid. You shouldn't be chugging the stuff like it's your job. Your body is very good at telling you when you're thirsty, so do not ignore it. Drink regularly, but sensibly. Not only will it help restore your voice, but it's good for your body, your digestive system, your skin, y