If you are searching for a yoga retreat in southeast Asia I can recommend Angkor Zen Gardens Retreat Center, in my opinion, the best yoga retreat in Siem Reap, Cambodia.
Angkor Zen is a beautiful yoga retreat, located about 10 min drive (4 km) from the Old Market in Siem Reap. It has been my home for the last couple of months, as a resident yoga teacher, and every day that passes by I just love this place even more.