March 20 (Reuters) - United Overseas Australia Ltd UOS.AX
* UOA Investments Pte Ltd has entered an agreement to set out principle terms and conditions
* Deal to acquire 50% interest in special purpose vehicle to construct and develop a mixed use apartment building complex in ho chi minh city
* Cost of acquisition of this 50% interest will be approximately A$19.5 million Source text for Eikon: ID:nASXcgX5ZD Further company coverage: UOS.AX