多谢 do ze :thank you.
唔该 ng goi :唔=not,该=should (Literal meaning:should not trouble/ bother you)
1.excuse me
2.for thanks, usually in asking for help or after you get help from sb,
e.g. 唔该帮我拿本书,after sb. done, say 唔该 for thanks is OK also.
3.for thanks,for polite, in the petty things of the life,informal usage,
e.g. when you buy something from the shop...
say 多谢 do ze for thanking gifts