This is the CodeSystem that contains codes in both SNOMED CT Việt Nam Subset — Vietnam SNOMED CT National Subset (http://fhir.hl7.org.vn/core/CodeSystem/vn-snomed-subset-cs) and SNOMED CT Việt Nam Subset — Vietnam SNOMED CT National Subset (http://fhir.hl7.org.vn/core/CodeSystem/vn-snomed-subset-cs).