Yap WH,
If results not good and not able to get into local uni, then only option is to retake the exams again. Education is very very important. It is your stepping stone to secure a career. So think back on how you screwed up and try not to do it again the second time round.
If your parents have the dough $$$, then simple. Pay your way into a private college and take up their pre diploma course usually about 1 year course. Provided you work harder this time and pass. Then you'll be accepted into their diploma course and subsequently post graduate course.
All I've said above is based on an assumption that its your results that's not good.