Just a bit about us

I was born and grown up in Vietnam. I came to Australia about 10 years ago. I started a family, had my first child in Sydney. The place where we were lived there were alots of Vietnamese people. I was very confident that my son will speak Vietnamese.
My husband is Australian, so we speak English with each other. He would speak few words in Vietnamese( just in foods!!!!!), so sometime he say things in Vietnamese. I speak Vietnamese to our son. I do believe he understand what I said.
We moved to Sunshine Coast about 7 years ago. That when the time I feel that I live in a English speaking country. Just a few Vietnamese people around. I still spoke Vietnamese at home with our son.
By 3, he could sing children song in Vietnamese, however he did not spoke in Vietnamese. He can just understand if I ask him to do a few simple things as turn the light on or off, close the door.... parts of the body,things in the house...That time I though that was good enough, I though that my son would speak Vietnamese. I will continue next time.