I'm so suprised my visa got approved yesterday (Sunday) after applying on the 23rd Jan in Hanoi! Technically less than 3 business days (because of Tet). I was really worried it wouldn't get approved in time for my flight out of here on the 6th. They didn't ask to see passport pages (apart from entry stamp the next day after application).
TLDR : Answer Summary
The post discusses a user's successful visa approval experience in Hanoi, where their visa was approved in less than three business days despite the Tet holiday. They express relief at receiving the visa in time for their flight. Several comments follow, where users share their similar experiences, inquire about document requirements, and discuss the ease of the application process.