Correct

顺藤摸瓜

/ shùn téng mō guā / 
Strokes

Definition

lit. to follow the vine to get to the melon/to track sth following clues

Example

Definition

follow the vine to get the melon—track sb/sth down by following some clues

1
Tāmen
他们
shùnténgmōguā
顺藤摸瓜
  
,
zhōngyú
终于
zhǎodào
找到
liǎo
了
zuìfàn
罪犯
de
的
xiàluò
下落
  
。

They tracked the criminal down by following clues on his whereabouts.