The French-Cambodian choreographer Emmanuèle Phuon, fondly known as Manou during her time as a dancer with Mikhail Baryshnikov’s White Oak Dance Project, digs into her past in “Khmeropédies I & II.” She began training at 5 at the Royal Ballet of Cambodia; in her new two-part work, which opened on Thursday night at the Baryshnikov Arts Center, she applies Western ideas to traditional Cambodian dance.