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Barred buttonquail or common bustard-quail 
(Cun cút lưng nâu, Cun cút vằn,Turnix suscitator) 

The barred buttonquail or common bustard-quail (Turnix suscitator) is a buttonquail, one of a small family of birds which resemble, but are not closely related to, the true quails. 
This species is resident from India across tropical Asia to south China, Indonesia and the Philippines.

Turnix is a genus of birds commonly known as Buttonquail or hemipodes of the family Turnicidae, of the order Charadriiformes referred to as shorebirds.
The genus name is an abbreviation of the genus Coturnix which is the Latin for the common quail.
The specific epithet suscitator is Latin and means "awakening".

Little buttonquail (Cun cút bé, Turnix velox) 

The little buttonquail (Turnix velox) is a species of buttonquail family Turnicidae.

Charadriidae, Charadrius: Late Latin word for a yellowish bird mentioned in the fourth-century Vulgate; from Ancient Greek kharadrios a bird found in ravines and river valleys (kharadra, "ravine").

Turnicidae is from Turnix abbreviation from genus Coturnix, quail(Coturnix is the Latin for the common quail); coined to reflect the quail-like appearance and lack of hind-toe.
The genus name Turnix is an abbreviation of the genus Coturnix.

The family Turnicidae is also referred to as hemipodes which , in Greek, means hemi half, semi; podes from Greek pous, podos foot (Latin pes).

Velox is a Latin word meaning "swift, quick, rapid,speedy" or "fleet" deriving from a root related to motion; it's the source of English words like "velocity".

Yellow-legged buttonquail (Cun cút chân vàng, Cun cút lưng hung, Turnix tanki)
resemble, but are unrelated to, the true quails.

The yellow-legged buttonquail (Turnix tanki) is a buttonquail, one of a small family of birds which resemble, but are unrelated to, the true quails.

The genus name is an abbreviation of the genus Coturnix.
Turnicidae is from Turnix abbreviation from genus Coturnix, quail(Coturnix is the Latin for the common quail); coined to reflect the quail-like appearance and lack of hind-toe.
hemipodes: Greek hemi half, semi; podes from Greek pous, podos foot (Latin pes).