Correct

煞费苦心

/ shā fèi kǔxīn / 
Strokes

Definition

to take a lot of trouble (idiom); painstaking/at the cost of a lot of effort

Example

Definition

cudgel one's brains; make painstaking effort; spare no effort; take great pains

1
Tā
她
shāfèikǔxīn
煞费苦心
xúnzhǎo
寻找
rúyì
如意
lángjūn
郎君
  
。

She took great pains in finding a good husband.

2
Tāmen
他们
shāfèikǔxīn
煞费苦心
  
,
tǎohǎo
讨好
lǎobǎn
老板
  
。

They were falling over backwards to please the boss.

3
Tā
他
shāfèikǔxīn
煞费苦心
píngxī
平息
cáiyuán
裁员
de
的
yáoyán
谣言
  
。

He was at great pains to deny the rumour of redundancies.