/ʌnˈkɒdɪˌfaɪd lɔː/ – noun
Definition: Luật không được viết thành văn bản.
A more thorough explanation: law originating from sources such as court decisions, custom and Roman law rather than legislation passed by legislative and administrative bodies
Example: Common law, which originated in England, is uncodified law, as opposed to statutes and ordinances.