How To Get A Job In Singapore, Austrailia, Nz….?

I am a vietnamese, graduated from university with electrical engineer diploma, I have 2 years experience working related to semiconductor wafer testing (probe card designer), how can I find a job in these countries above, I have applied many times in some job websites, but no one responded me, I would like working oversea so that saving enough money to study higher education, and get more working experience at oversea, I am too young (24) so I am not afraid of problem and difficulty to do that, anybody have any information about this, pls help to inform me