You can buy a FamilyTreeDNA test, through which you can become a member through registration of our DNACambodia project. However, to increase your chances of finding a relative, we recommend that you buy a DNA test from Ancestry or 23andme, and then download you RAW DNA to your computer. You can upload for free your RAW DNA to FamilyTreeDNA (home to DNACambodia Project), Gedmatch and MyHeritage. Detailed instructions of how to transfer results are on our website.
If you want advice, you can use our advice tool for help deciding what is best for you.