Jasen, the pics you posted are of vanda masao yamada not euanthe sanderiana. The species vanda sanderiana (syn euanthe sanderiana) is originated in the Philippines, where it is endemic to Minadanao Island in the provinces of Davao, Cotabato and Zamboanga. The common name of sanderiana in the Philippines is "walingwaling".
Vanda masao yamada is lazy to bear flowers. You have to be patient for so long time to see their flowers.
Here are the pics of real euanthe sanderiana:
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