Local authority doesn’t care, because it’s a very western problem. Locals rarely have problems with it, and use “go left the second street after the big tree near the market, and then it’s the third house on the right”.

Local people generally don’t use navigation apps like Google Maps, they don’t know how to use it.

Person name, Local-area name, Region Name, Country name, Phone number

This gets it to the nearest handler to the local area, who then needs to know where the person lives or call them.

Also, there are special delivery companies like CamboQuick that take the whole process out of your hands and use (slow) ships freight to ship stuff from Amazon et al to Cambodia. You’ll have to wait 4-6 weeks, but they handle the custom clearance and everything and deliver it to your house for a $2 fee.

I managed to find one site that would accept 'null' so the form would submit.