“Oh, oh …” is not an English interjection but something very much as Malaysian as nasi lemak and fried kuew tiow. Spoken in a decreasing undertone, it is a mild surprise reaction. “Oh, oh … ye ker?” is also a mildly surprise reaction but remained mildly sceptical.
It is the typical reaction of common Malaysians and their moderate temperament. That could be the beginning to a more enlightened disposition. But we are not out change the world. Good enough to make happenings around us more sensible. Read more here