help translate

[frenzie2]

ta phai chuan bi thi oy, ta se vang mat 1 thoi gian

[english-learner]

ta phai chuan bi thi oy, ta se vang mat 1 thoi gian

I don't know what "oy" is but I think it's "oh". Anyway, this is my translation:

I have to prepare for the (next) examination oy, I'll absent for a period of time.

[vietnamese4u]

oy = zòi = rồi
nói chung có thể omit