National Security Adviser Ajit Doval on Monday held separate high-level talks with Vietnam's ministers of public security and foreign affairs on strengthening bilateral cooperation in security and other areas and agreed to further enhance the existing "multifaceted" ties. Hanoi, Nov 03: National Security Adviser Ajit Doval on Monday held separate high-level talks with Vietnam's ministers of public security and foreign affairs on strengthening bilateral cooperation in security and other areas and agreed.