do good

Từ điển Oxford Advanced Learner 8th

do ˈgood | do sb ˈgood idiom
to have a useful effect; to help sb
• Do you think these latest changes will do any good?
• Don't you think talking to her would do some good?
•I'm sure a few days off would do you a power of good (= improve your health).
Main entry: ↑good_idiom