what do ''Te nau bong gua le' mean?

Hmm... The way I see it, either you've taken this extract from an audio source and tried to write it down (in a way that doesn't really resemble Finnish at all) or that you've mistaken some other language for Finnish. In any case, written this way I've got no clue what the phrase could mean, but if you could tell me the context, maybe it would be easier to guess... So, where did you hear that?