Tra từ ngoặc tay - Từ điển Việt Anh (Vietnamese English Dictionary)

[ngoặc tay]
	to link forefingers (in sign of a contract agreed upon).
		Ngoặc tay thi đua làm xong việc trước thời hạn
		To link forefingers and emulate one another in completing one's work before schedule.
	link one's finger with another person's finger (as a promise to do something together)

Link forefingers (in sign of a contract agreed upon)

Ngoặc tay thi đua làm xong việc trước thời hạn

To link forefingers and emulate one another in completing one's work before schedule