I had one and he was difficult, bite a few people had to pay vaccines few times.

Probably not took enough time to take care of his education, was roaming the house the first few month, but started be aggressive with any intruder or even toward the kids..
Placed it in the factory where he had huge space and freedom, but we had to attach him at the end as he was after many people and employes got scared as well...

I was told they are among the dumbest dogs in Thailand, stay well with owner and beware others, was quite a bit the case for ours...

At the end a dog need a good education while young, we not did it, kind of our fault that behavior...