Did you mean: buji box buxie buzi bus bixi ?
| 
补 | 
bǔ xí | to take extra lessons in a cram school or with a private tutor | 
| 
不 | 
bù xī | not stint / not spare / not hesitate (to do sth) / not scruple (to do sth) | 
| 
不 | 
bù xī | continually / without a break / ceaselessly | 
| 
布 | 
Bù xī | Taiwan equivalent of 布什 |