PHI Group's Chairman Henry Fahman and Executive Vice President John Nguyen to Speak at the 2009 Vietnamese American Summit Conference LOS ANGELES, CA--(Marketwire - May 6, 2009) - PHI Group, Inc., formerly Providential Holdings, Inc. (OTCBB: PRVH) (FRANKFURT: PR7) (WKN 935160), a company engaged in mergers and acquisitions, real...