... appear beyond our expectation In Vietnam, especially in the Vietnamese workplace, bosses and staff are aware of the fact that a suitable address term can establish and maintain a good relationship ... interaction, academic qualification Other linguistic and cultural factors are beyond this research Design of the study The study contains three parts Part 1, the introduction, includes the rational, ... the aims of the study, the methods of the study, the scope of the study and the design of the study Part 2, Development, is the most important part in the study, contains chapter - Theoretical...