it's no use doing something

Từ điển Oxford Advanced Learner 8th

it's no ˈuse (doing sth) | what's the ˈuse (of doing sth)? idiom
used to say that there is no point in doing sth because it will not be successful or have a good result
•What's the use of worrying about it?
•It's no use— I can't persuade her.
Main entry: ↑use_idiom