không sai quá 1 cm 
less than 1 cm off, with an error of less than 1 cm [ không ] : (1) no, not; (question tag); (2) air; (3) empty
[ sai ] : (1) to order, command; (2) wrong, incorrect, off by
[ quá ] : (1) very, extremely; excessive; (2) to go beyond, go past; past
Most Common Compounds Set 1:
Most Common Compounds Set 2 :