Report Abuse. Normally if you are a new Vietnamese learner, you may be taught to say Hello in Vietnamese language by saying “Chao” chào “Or xin”. Chao chào but Actually in vietnamese daily life we “Rarely” say “Chao chào” or xin chao (“Chào to” greet someone xin chao “Chào” is rarely used and chao chào Is). a little bit rude in vietnameseee the details how to say hello in vietnamese as Vietnamese native speakers at: http://www.howtospeakvietnamese.com/how-...