@anne2790
If you visit this page (http://pinoyau.info/plugin/page/accredited-schools/P), you will see that PNU is listed under Section 2. To be honest, I'm not quite familiar with that system so I'm not really the best person to ask about this.
In my opinion, it would be best to just submit your assessment for migration application to AITSL, because they will determine whether your teaching degree is equivalent to a four-year degree or not, which will in turn give you the 15 points that you need for the point system.
Here is their website: http://www.aitsl.edu.au/assessment-for-migration
Good luck!