WorkVenture gives you an inside look at what it's like to work at P.h.d. Trading Co., Ltd. ., office & team photos, reviews and more. This is the P.h.d. Trading Co., Ltd. . Company Page. All content is posted anonymously by employees currently or previously working at P.h.d. Trading Co., Ltd. ..Apply to GoWabiApply to Le BangkokApply to Knowing BuddhaApply to WV