Where can i buy Kitchen Princess Manga here in the Philippines?

I'm currently searching in the internet. But unfortunately, I can't find some malls here in Philippines or near to Rizal that sells manga like Kitchen Princess in cheap prices. My friend have a copy of volume one from National Bookstore. But then, I can't find it there. I also checked the online site of it and found nothing. So guys, I'll be really needing your help. Thanks. :)