This is the ValueSet that contains all the codes in Hình thức chuyển tuyến — VN Referral Mode ValueSet (http://fhir.hl7.org.vn/core/ValueSet/vn-referral-mode-vs) and Hình thức chuyển tuyến — VN Referral Mode ValueSet (http://fhir.hl7.org.vn/core/ValueSet/vn-referral-mode-vs). E.g. what you have to deal with if you get resources containing codes in either of them