да нет наверное = no (if somebody use both these words together) For example: - May I help you? -hmm, no,thanks. - Могу я вам помочь? -да нет наверное, спасибо. ("да" , “наверное" means here that you thinking . You are not sure may this person help you or not, and you saying -no, I needn't help (да нет наверное)) =) You need just memorize that it's –no.That’s all)

very interesting question! )) everyone who studies russian asks that. And Anastasya is right.

Oh Thank you! It seems,I understand )

It mean just one "No, but I'm not sure"

Link one more time: http://tiny.cc/2rppkw