"[F]or the first time, the Civil Code [of 2015] states that courts in Vietnam shall not deny solving civil issues, because there are no existing regulations governing such issues. The Civil Code also allows courts to make decisions based on certain court precedents issued by the Supreme Court or based on the principle of fairness when there are no regulations, Customs or analogous laws that can be applied to solve the legal issue."A look at Vietnam's legal system - Oxford Business group
Also see Nguyen Hong Hai, Court Precedents in Vietnam: A View for the Building of the 2015 CIvil Code, Vietnam Law & Legal Forum, 7/31/2017; Ngoc Son Bui, The Socialist Precedent, 52 Cornell Int'l Law J. 421 (2019)(appendix contains a list of precedents. Most other cases are binding only on the parties typical of a civil law system.).