First, study the use of theoretical research methods at the table. As Okoli and Schabram (2010), studied at the table (or analyze documents, reviews the system theory) is a method of systematic, comprehensive, explicit aims to identify, evaluate, synthesize the content in the research was completed and published by researchers , scholars and experts. Besides, the author Tranfield, Denyer and Smart (2003) also stated that the theory system research has become a basic science activities. Second, the article uses semi-structured interview methods include: in-depth interview some experts and case studies. Semi-structured interviews are the interview based on the list of questions or topics need mention. However the order and putting the question can depend on the context and the characteristics of the subject interview. Types of semi-structured interviews include:
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