Electoral system for national legislature
Viet Nam
Nohlen et al. Elections in Asia and the Pacific: A Data Handbook. 2001
Voters have to cross out all names of candidates who they do not wish to elect. If necessary, a second round is organized within 20 days among all the candidates who have not been elected in the first round, applying the absolute majority system. If the second round does not result in the election of all seats, no additional round will be conducted