Hi, I do not know the length of the documents, however, I surely can give you reasonable price. I used to translate notarized documents for notary so you can be assured. I even can provide you the notary service if you are in Hanoi. As a Vietnamese, I understand the original meaning of the documents and with my high level of English proficiency, I can translate it with the legally closest meaning in English.
Feel free to contact me for any question.
Best regards,
Trang