This is the ValueSet that contains all the codes in Chuyên khoa y tế — VN Medical Specialty ValueSet (http://fhir.hl7.org.vn/core/ValueSet/vn-specialty-vs) and Chuyên khoa y tế — VN Medical Specialty ValueSet (http://fhir.hl7.org.vn/core/ValueSet/vn-specialty-vs). E.g. what you have to deal with if you get resources containing codes in either of them