Structure of the thesis: - Thesis includes 132 pages; 2 page issue; 29 page overview of the document; 23 page research method subjects; 41-page research results; Discuss 34 pages; Concludes 2 pages; 1 page proposal; There are 43 tables, 15 image; 8 boxes; 112 references in which 47 Vietnamese documents and 65 English documents.