... production and social activities after NASCO applies the model of join -stock Company, the President of Socialist Republic of Vietnam signed the decision to offer NASCO the second-rate Medal of Labor. ... Join -Stock Company, duty-free shops formation of duty-free business in the world and in Vietnam, concepts of duty-free, problems related to the study, scope of the study, methodologies, and ... entry at the Vietnamese border gates 1.4. Problems related to the research topic, research questions, methodology and score of the research 1.4.1. Rationale of the study 1.4.2. Scope of the study,...