The (, Chữ Nôm: å½ÂäºÂ), also called , is a Vietnamese bowed string instrument with two strings. The word nhá» means "two" in Sino-Vietnamese, and means "instrument". Its sound box is generally covered on one end with snakeskin.
There is some variation in construction between different forms of the ÃÂàn nhá»Â. Instruments colloquially referred to as ÃÂàn cò are often more similar to the Chinese Erxian Khmer tro and Thai saw duang, while instruments referred to as ÃÂàn nhá» are often constructed more similarly to the modern erhu of China. However, in the past, both names referred to what is now generally called the ÃÂàn cò. In the past, it was often paired with the ÃÂàn gáo, not unlike the pairing of the Yehu and Erxian/Gaohu in Cantonese music, or the pairing of the Saw duang and Saw u in Thailand, although this pairing is a bit more rare in modern times as the ÃÂàn gáo is falling into disuse. As well, the traditional handmade ÃÂàn nhá» have been replaced by Erhus purchased from China in Nhạc dân tá»Âc cải biên ensembles.
It is related to the huqin family of instruments of China. Some Austroasiatic groups in Vietnam also have their version of the ÃÂàn cò. The Mðá»Âng have the cò kè, the Chứt have the t'rábon, the Khua have the karong, and the Khmer have the tro.