rõ như ban ngày 
as clear as daylight or crystal [ rõ ] : clear, distinct; clearly, distinctly; to know well, understand clearly
[ như ] : like, for example, as, such as, similar
[ ban ] : (1) board, committee, commission, department, section; (2) unit of time; (3) to confer, give, grant, award, bestow; (4) ball; (5) fever
[ ngày ] : day, daytime, date
Most Common Compounds Set 1:
Most Common Compounds Set 2 :