Category talk:Vietnamese terms borrowed from Chinese

Three categories for the same thing
Why do three different categories for the same thing: "Vietnamese terms derived from Chinese," "Category:Vietnamese terms borrowed from Chinese," and "Sino-Vietnamese words," exist? 204.11.186.190 14:38, 30 January 2018 (UTC)
 * See Category talk:Vietnamese terms derived from Chinese. — justin(r)leung { (t...) 14:56, 30 January 2018 (UTC)