Dear Mr. Headmaster of Vinh university,
My name is [...], from class [...]. I am writing to ask you to let me join an English course to improve my listening and speaking skills. I want to ask you about the fee, is it expensive? And also, what time does the class start and finish? And at the end of the term, does the class have an exam? I really hope to improve my listening and speaking skills so that I can get 8.0 IELTS. Look forward to your help!
Sincerely,
[your signature]