This study investigates the impacts of corporate governance on firm’s performance evidence of Vietnam. We use factors such as Board size, State ownership, Nonduality, Capital expenditure to total assets ratio, Operating cash flow, Natural logarithm of total assets, Net sales growth, Asset growth rate and Leverage. We enhance our analysis using nonlinear multiple regression analysis. It bases on 825 observations of 75 companies that specializing in trading consumer goods for the period 2007 to 2018. We find that differences in size amongst firms may lead to differences in firm performance as firm size is correlated with firm operating environment, source of organizational costs diversification of business and information asymmetry.