• June, 2006: The 2nd IMT-GT 2006 Regional Conference on Mathematics, Statistics, and Applications, Penang, Malaysia
• April, 1987 : All-Union Conference on Classical and Nonclassical Boundary Value Problems of Partial Differential Equations, Special Functions, Integral Equations and Their Applications, Cuibusev, Russia
• September, 1990 : 4th Congress of Vietnamese Mathematicians, Hanoi, Vietnam
• June, 1992 : Conference on New Trends in Mathematics and Applications,Quynhon, Vietnam
• August, 1994 : International Workshop on Transform Methods and Special Functions, Sofia, Bulgaria
• August, 1996 : Second International Workshop on Transform Methods and Special Functions, Varna,Bulgaria
• February, 1998 : International Conference on Inverse Problems and Applications, Quezon, Philippines
• May, 1998 : International Conference on Fourier Analysis and Applications,Kuwait
• January, 1999 : Regional Workshop on Analysis and Numerics for Inverse Problems, Kiryu, Japan
• July, 1999 : International Conference on Feynmann Integrals and Related Topics, Seoul, South Korea
• January, 2001 : First International Conference on Industrial and Applied Mathematics in Indian Subcontinent and Sixth Annual Conference of ISIAM, Amritsar, India
• February, 2001 : International Conference on Analytic Methods of Analytic and Differential Equations, Minsk, Belarus
• August, 2002 : International Conference on Abstract and Applied Analysis 2002 (ICAAA 2002), Hanoi, Vietnam
• June, 2005: International Conference on Abstract and Applied Analysis 2005 (ICAAA 2005), Quynhon, Vietnam
• September, 2006: The 4th International Conference Analytical Methods of Analysis and Differential Equations AMADE 2006, Minsk, Belarus
