The Vietnamese word "đất liền" refers to the mainland or continent. It describes land that is not surrounded by water, as opposed to islands or coastal areas.
Chúng ta sẽ đi du lịch đến đất liền vào mùa hè này.
Hòn đảo này nằm xa đất liền.
Remember, "đất liền" is used to refer to solid ground that is not surrounded by water. It's a useful term when discussing geography, travel, or even metaphorical concepts of stability.