I used to teach Vietnamese to two Japanese people. Therefore I understand the hardship that learners would face when it comes to learning the Vietnamese pronunciation. I've learned how to teach Vietnamese pronunciation since then. I would say I'm rather confident in teaching you how to generate sounds in Vietnamese, thereby well to perfectly pronouncing words.
Besides, I worked as a private English teacher for 3 students in the age of primary and secondary school students a few years ago. Additionally, I'm also an English learner. That's why I understand how to learn English and can share my experience of learning English efficiently including grammar, pronunciations, idioms, lexises, etc.