hehehe as for me I am Viet born but have grown up in Oz..so not much help...lol.
here is adding to the confusion
nó yêu mày đó .. he does love you ..
cái con đó ..that girl ..
ông đó cứ nói đó đây ..that man kept on talking vaguely ..here and there..
đó ..thấy chưa ? there.. see?
đó at the beginning seems to emphasise something..
đó ..tao nói mày rồi đừng có tin cái thằng đó ..hehehe
there...told you already not to believe him..