giật mình khi biết 
to be surprised to know, learn [ giật ] : (1) snatch, steal; (2) to win; (3) to give a shock; (4) to pull; (5) to recoil; (6) borrow money temporarily
[ mình ] : body, oneself, I, we (inclusive)
[ khi ] : occasion, time (when something happens), when, at the time of, if
[ biết ] : to know, know how to do (something) be aware of
Most Common Compounds Set 1:
Most Common Compounds Set 2 :