I'm sorry to say that you are not going to be able to convince INZ to give your girlfriend a visa based on partnership with only the situation you describe. For INZ, partnership is ONLY proved by having set up home and lived together - and we know from experience that they take applications seriously with two to three months' evidence.
Partnership visas are the ones most targeted by fraudsters, because there is no requirement to show qualifications or work experience, and the crooks pay people to lie for them about being in a relationship. Therefore, INZ don't take what anybody SAYS about their feelings and future plans for evidence. They ONLY accept the action of having begun to live together, which can be proved by evidence, and known about by other people. They do understand about other cultures having different norms, but they can't and don't make any allowance for that.
To go further with any plans to get your girl a partner-sponsored visa, if you and she want to keep to your traditions and have her parents happy with it, it sounds as though you are probably going to need to marry, so that you can live together openly and collect evidence.
Whether you marry or not, in order to qualify for a visa through partnership, you will need to move in together and gather a lot of evidence (see old threads for discussion and ideas
https://www.google.co.uk/#q=site:enz...tnership+proof), before applying to INZ after two to three months. This could be in the Philippines, or in NZ, or in any country where you can both legally stay for that length of time. I know there are difficulties - time off work, etc.. Your partner might be able to get an ordinary visitor's visa for NZ, on the "look, see and decide" basis.
Other things to think about are whether your partner could qualify for a NZ work visa in her own right - this would depend on what qualifications and work experience she has.