What are the chances of needing more documents or an interview after being on pending approval for my visa application?

A user in Hanoi is concerned about the possibility of being asked for more documents or an interview after their visa application has been on "pending approval" for over a week. They received a request for a higher quality picture of their passport and are anxious about upcoming travel plans outside Vietnam. Community members shared their experiences, indicating that while additional documents can be requested, interviews are less common. They advised staying within the jurisdiction of the embassy until the application is finalized and suggested sending an email for updates.