劳神费力

勞神費力
láoshénfèilì

to be taxing on one's mind and strength

Wiktionary

Entry Composition

1 劳神 láoshén
  1. to be a tax on (one's mind)
  2. to bother
  3. to trouble
  4. to be concerned
2 费力 fèilì to expend a great deal of effort