*Muỗi kêu: the buzzing sound mosquitos make when they fly (which sounds like flute).
* Đỉa: an aquatic worm that sucks animal and human blood.
* Lội lềnh: swimming in swarms, covering the whole water surface (like noodle).
Cà Mau is a coastal province in the Mekong Delta, in the Southernmost part of Vietnam. These folk lines are examples of hyperbole describing the remoteness, danger and wilderness of this area.