不要這麼吹毛求疵。

You don't have to go getting so hairy about such a small thing.

Source: Tatoeba

Sentence Composition

1 不要 bùyào don't!; must not
2 這麼 zhème
  1. so much
  2. this much
  3. how much?
  4. this way
  5. like this
3 吹毛求疵 chuīmáoqiúcī
  1. lit. to blow apart the hairs upon a fur to discover any defect (idiom); fig. to be fastidious
  2. nitpick