māna (noa ake) te kore e ...
1. it's pretty certain, most likely, chances are, it's odds on - an idiom to indicate that the speaker really believes something she/he is about to say.
Ko te mea nui kē ka uru mai ko ngā tōtika māna noa ake te kore e puta, ā, kua whai hua tāna i utu ai (HM 4/1993:4). / The main thing is that the right ones enrol and it's pretty likely that they'll pass and they will have benefited from what they paid for.
Ka pēnei mātou, māna te kore e kite mai i ngā whakatūpato o roto i te pōhiri, ā, mā reira e mōhiotia ai ehara tēnei i te kura mā te hunga kātahi anō ka tīmata te arero ki te tārai kupu Māori (HM 4/1994:7). / We thought mistakenly that it was pretty certain that they would see the caution in the invitation, and through that it would be known that this was not an educational gathering for the people who had only just started getting their tongues around Māori words.