Vietnam's foreign direct investment inflows topped US$4.02 billion in the first three months, more than twice the figure for the same period last year, according to the Foreign Investment Agency.
More than 68 percent of it came into 473 newly licensed projects.
Manufacturing continued to attract the largest amount ($2.9 billion) followed by property ($240 million).
South Korea was the top investor, accounting for more than a fifth of the FDI.
Singapore and Taiwan were in second and third places with 13.7 and 11.5 percent.
Samsung’s $300 million research and development center in Hanoi was the largest project to be licensed.
It was followed by a $210.58 million computerized lottery business by Malaysia's Berjaya Corporation and local investors.