[hoian]

On another note, tourists to Central Vietnam would do well to pronounce the cities properly:

Da Nang is pronounced "da nung" ("nung" rhymes with lung).
Hoi An is pronounced "hoi anne" (Anne as in the lady's name).
Hue is pronounced "hoo way" (not "hew" as some tourists call it).

Central VN has its own distinctive dialect and even Vietnamese from Hanoi or HCMC may not understand the dialect. Hue, itself, has its own unique dialect that is different from Danang or Hoian.