Yes, you can fill out a simple form at 254 Nguyen Trai Road, District 1 before noon. The person at a designated window will do a quick review of your required paperwork, issue a receipt with a pick up date, usually up to a week. You will pay $10 (or $20, I forgot!) at pick up. The visa is linked to your passport number; it will take up a whole page- its expiration date is limited to the life of your passport. Remember, your passport number will change upon renewal. Also, visa renewal will be simpler because you only fill out a form; no further documents needed.