The QuickBooks Desktop version is available in the US, Canada, and United Kingdom. But for some customers on other countries, we do have authorized international resellers and partners. When you visit their website, you'll see other available Desktop versions.
I'd also suggest switching to the Online version as it supports international countries. You can visit our website, set the country to Cambodia, and compare the three versions of QBO. Here's the link: https://quickbooks.intuit.com/global/pricing/.
Please keep me posted if you have additional questions about this.
I noticed you already have subscribed for QBES Platinum. How did you subscribe it? If you don't have any local QuickBooks reseller or partner, we could help you to purchase additional seat for your current subscription. Please keep in mind we are located in Indonesia.