Which area of study are you planning to pursue Master's degree ka?
You said เกรดเฉลี่ยรวมตอนเรียนตรีได้แค่ 2.0, but what is your GPA or grades for major or important classes (mainly the last 2 years of college)?
If you can do excellent job in having a high TOEFL or GMAT/GRE (whatever is required), then of course you still have a chance ka.