This is the ValueSet that contains all the codes in Văn bản pháp lý VN — Vietnam Legal Document Reference VS (http://fhir.hl7.org.vn/core/ValueSet/vn-legal-document-ref-vs) and Văn bản pháp lý VN — Vietnam Legal Document Reference VS (http://fhir.hl7.org.vn/core/ValueSet/vn-legal-document-ref-vs). E.g. what you have to deal with if you get resources containing codes in either of them