Thứ kèn của mục tử (gender unknown)
Bagpipe: any type (even if foreign to the local tradition)
Dubious entry in the rather unreliable internet source; The literal translation of the term is "shepherd’s clarinet" ("Thứ kèn"(clarinet), "của mục tử" (shepherd), which seems to indicate that the Vietnamese have no name for the bagpipe).