ra sao thì ra 
whatever happens, happens [ ra ] : to go out, exit, give, issue, emit, leave
[ sao ] : how?, what manner?, why? (is that); to matter
[ thì ] : (1) time; (2) then, as for, however, in that case, certainly, for sure
[ ra ] : to go out, exit, give, issue, emit, leave
Most Common Compounds Set 1:
Most Common Compounds Set 2 :