斤斤較量 [－－较－]

Jyutping gan1 gan1 gaau3 loeng6
Pinyin jīn jīn jiào liàng

Definitions (CC-CEDICT)
  1. to bicker at length over a trivial matter (idiom)
Definitions (Wiktionary)
  1. phrase, idiomatic
    to dispute over minor matters