I sometimes need to say the equivalent of sorry, could you repeat that... I have found one comfortable phrase (for me) to handle this situation but would like to learn other phrases to use in this case.
When speaking Cantonese I might say something like
nei gong mutyeh, ting m doh (lit: what did you say, I didn't hear everything)
I'm sure that Mandarin and maybe even Cantonese speakers would not say this phrase. But people get my gist as a non-Asian. I'd be grateful for any wisdom shared so that I can communicate this concept better.