The Vietnamese phrase "đặt điều" means to fabricate a false story or to create a rumor, particularly one that is meant to harm someone's reputation. It's often used when someone is accused of making up lies or spreading false information about another person.
"Đặt điều" can be used in both formal and informal contexts. In a more serious context, it might be used when discussing legal matters or serious accusations. In an informal context, it can appear in gossip or casual conversations.
While "đặt điều" primarily refers to the act of fabricating stories, it can also imply setting traps or creating situations that could lead to misunderstandings.