I've had the same interest in finding "Tanging Yaman" recently. It's truly a classic and beautifully captures familial relationships and cultural values. I found that sometimes local streaming platforms like iWantTFC or VivaMax will have it in their library, so it's worth checking there. Occasionally, festivals or cultural events will host screenings of iconic Filipino films, and keeping an eye on organizations like Cinemalaya for any announcements could be helpful. Additionally, libraries or cultural centers sometimes have DVDs available for lending. Have you tried looking into those possibilities? I’d love to hear if you find it through any other means!