Link truy cập bài báo: http://www.macrothink.org/journal/index.php/ber/article/view/16983?fbclid=IwAR1UqxfwVmHmNy7Twh4fAHjhZHQJVbdTd7GWH5lV-0fP-elmZeO4kPltTgE