Correct

卖力气

/ màilìqi /
Strokes

Definition

to make a living doing manual labor/to give sth all one's got

Example

As a Verb

do one's very best; exert all one's strength; exert oneself to the utmost

1
xué
学习
法语
hěn
mài
qi
力气
  

He works hard at his French study.

2
néng
可能
yǒudiǎn
有点
màn
  
,
dàn
què
shì
kěn
mài
qi
力气
de
rén
  

She may be slow, but she always does her best.

As a Verb

live by the sweat of one's brow; make a living by manual labour

3
Mài
qi
力气
yǎngjiākǒu
养家糊口

support one's family by manual labour