1. School of Literature, Shandong University, Jinan, Shandong Province, China
2. Arabic Language and Literature, Faculty of Literature and Humanities, University of Mohaghegh Ardabili, Ardabili, Iran
3. Faculty of Journalism and Mass Communication, Sofia University, Sofia, Bulgaria
4. Department of Training Management, Hong Duc University, Thanh Hoa City, Vietnam
5. Fractional Calculus, Optimization and Algebra Research Group, Faculty of Mathematics and Statistics, Ton Duc Thang University, Ho Chi Minh City, Vietnam