Filing a Divisional Patent Application in Vietnam

In Vietnam, divisional practice is fairly flexible.  Specifically, one or more divisional applications can be filed: (1) in response to a lack of unity rejection; and/or (2) at any time for any reason (e.g., voluntary divisionals are permitted).   The specification of a divisional application must not go beyond the original specification of the parent application.  In other words, no new matter can be added in a divisional application.