HAJI MAJI

On the left, the single string Dan Bau. On the right is the two string fiddle called Dan Nhi.

Another uniquely Vietnamese instrument with raised frets, the Dan Day.

L to R; another raised fret instrument is the Dan Nguyet (in the south called Dan Kim), a bowed Dan Nhi, the Vietnamese zither called Dan Tranh, I can't quite make out the next fiddle, but I think it's a Dan Gao, and finally the Dan Tam, related to the Chinese sanxian.