Hello!
If I am not wrong, the job that requires translation from English to Thai is yours as well and I have just placed my bid there.
Again, I can do the same for you from English to Vietnamese. And if both projects are awarded to me, I can lower the price of the Thai job. Also, I can send you a EN - VN translation sample. If you are satisfied with this, we can proceed.
Feel free to contact me. Thank you.
Kind regards.