Banks with safe deposit boxes in Da Nang

Hello, I am planning to retire in Da Nang in a year or less so I am starting my research process on banking. I have a 5 yr VEC so I'm assuming I can open a bank account. I was wondering if there's a bank in Da Nang that has branches throughout VN that also has safe deposit boxes to rent? I would like to keep important documents and cash in the deposit box so I can feel more comfortable that the documents are in a secured place. Don't trust hotel/AirBnB safes because employees have master codes to go into the safe to reset for the next guests to use. The multiple branches is if I open an account with the bank, I can withdraw money from other large cities I visit. Appreciate any info.