This is an interesting blog.
FRD, I think your grandma hakka is a bit short cut. That is how the old people talked.
In my generation, the sentence would be this way, "ngai mti kiadui tso nai4 vui loi qi ko nai4 tang"
Sorry I am not good in tone.
Translaltion: "I do not know where they come from, went through where or which places?"
Discussions on the Hakka dialects.