Cách sử dụng
The expression "behind closed doors" means that something is happening in private or secret, away from public view or knowledge. It is often used to describe conversations, meetings, or actions that occur in a private setting, such as a closed office or a private room. For example, a company may make important decisions behind closed doors, or politicians may hold private meetings to discuss important issues. It can also be used to suggest that there may be something suspicious or hidden happening.