public IActionResult NewTest()
{
ViewBag.ListeningQuestionCount = _TestCategoryManager.ListeningQuestionCount();
ViewBag.ReadingQuestionCount = _TestCategoryManager.ReadingQuestionCount();
ViewBag.SpeakingQuestionCount = _TestCategoryManager.SpeakingQuestionCount();
ViewBag.WritingQuestionCount = _TestCategoryManager.WritingQuestionCount();
// Lấy danh sách GV Hướng dẫn
ViewBag.Instructors = _UserManager.GetAllInstructors();
return(View());
}