ㄙㄡㄔㄤˊㄍㄨㄚㄉㄨˋsōucháng‑guādù

搜肠刮肚
  1. 形容苦思苦想費盡心思 搜腸刮肚半天什麼主意」。

to search one's guts and belly (idiom)​; to racks one's brains for a solution