ÃÂèo VÃÂn Trá» (, 1849 â 1908 in Lai Châu) also known as his Lao name Cam Oum (or Khamhum, ), was the White Tai leader at Muang Lay in the Sip Song Chau Tai or Federation of the Twelve Tai states, of the Tai Dam people.
ÃÂèo VÃÂn Trá» was a son of ÃÂèo VÃÂn Sinh (Kham Sing). In his early life ÃÂèo VÃÂn Trá» had studied as a monk at Wat Xieng Thong temple in Luang Phrabang. He held the de facto power from 1886, although his father was still alive.
At that time, French extended their control in Tonkin. Trá» stood by the Vietnamese Nguyá» n dynasty. He responded with Tôn Thất Thuyết's Cần Vðáng movement together with Nguyá» n VÃÂn Giáp and Ngô Quang BÃÂch. Thuyết had sought for political refuge in Muang Lay, however, Thuyết did not trusted him. Later, Thuyết fled to China.
Trá» also made common cause with Chinese Black Flag Army. ÃÂèo VÃÂn Trá» sought help from Siamese, but Siamese occupied Muang Thaeng and attempted to place Sip Song Chau Tai under Siamese control. During the Haw wars, three of his younger brothers were captured and held prisoner by a Siamese military expedition, which made him enraged. In 1887, ÃÂèo VÃÂn Trá»Â's Dai soldiers together with Chinese Black Flag Army soldiers, sacked Luang Phrabang. Auguste Pavie prevented the capture of the ailing local ruler Oun Kham and had him taken to safety but ÃÂèo VÃÂn Trá» captured the local uparat prince Souvanna Phomma and executed him on June 8, 1887. ÃÂèo VÃÂn Trá» used the temple as his headquarters, along with Wat Suwannaphumaham, sparing them any damage. Pavie allied with ÃÂèo VÃÂn Trá» and France recognised him as leader of Sip Song Chau Tai in 1890. Siamese released his brothers back to Sip Song Chau Tai.
He was succeeded by his son ÃÂèo VÃÂn Long.