HANOI, June 29 (Reuters) - Vietnam"s budget airline VietJet Aviation (VJC.HM) is seeking shareholder approval for its plans to sell a stake of up to 15% via a private placement, and to raise $300 million through a bond sale on international markets, the company said on Tuesday. VietJet said in a statement it is targetting a 20% rise in revenue this year to 21.9 trillion dong ($951.35 million), adding it will hold a shareholders" meeting later on Tuesday. ($1 = 23,020.0000 dong) Reporting by Khanh Vu Editing by Ed Davies Our Standards: The Thomson Reuters Trust Principles.