To teach in Malaysia typically you will need to be a Native English speaker, have 3 years of experience, have a degree in line with what you are teaching and hold a valid teaching qualification.
It should be noted that many schools ask only for teachers over 27 and a large amount additionally ask for a teacher with an understanding of the UK Curriculum.
Finally, TEFL, CELF, Delta and other certificates of a similar nature are not considered valid teaching qualifications but will work towards you when applying, should you have them,