1. Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya, Japan
2. Department of Training, University of Law, Hue University, Hue, Vietnam
3. Department of Organization, Administration and Facilities Management, University of Agriculture and Forestry, Hue University, Hue, Vietnam
4. Faculty of Forestry, University of Agriculture and Forestry, Hue University, Hue, Vietnam