National security is one of the most critical elements for Vietnam society, economy and political system, their stability, sustainability and prosperity. It is unconditionally the top priority for Vietnamese government, State, Communist Party and military forces. The article proposes a new research approach treating security and military science as interdisciplinary, but two of the branches of social science. Using empirical analysis and case study as research methods, the article is focused on internal instability as challenging security issue that could pose (...) a real threat and danger to the current socio-economic and political system. Based on the obtained research results we can draw some implications and propose some viable solutions for the Vietnamese authority to guard the safety and security of the people, society and also its political existence. (shrink)