HANOI, July 3 (Reuters) - Vietnam's State Treasury raised 11.49 trillion dong ($451.5 million) in an auction where it had offered 17 trillion dong of government bonds at the Hanoi Stock Exchange on Wednesday.

The amount is lower than the $532 million raised last week, a bourse filing showed. The uptake was also lower, with 67.6% of the offer sold, down from 90% in last week's auction.

The Southeast Asian country is aiming to raise 400 trillion dong from government bond sales this year, mainly to fund its public investments, one of the key drivers of economic growth.

The State Treasury sold 11.49 trillion dong out of the 15 trillion dong of 10-year bonds offered on Wednesday with a coupon of 2.74%.

It failed to offload any of the 2 trillion dong of 5-, 15- and 20-year bonds.

Vietnam has so far this year raised 165 trillion dong from government bond sales, according to data from the exchange.

Companies in Vietnam raised 115.2 trillion dong from corporate bond issuances in the year to June 28, according to data from the Vietnam Bond Market Association. (Reporting by Khanh Vu Editing by Ed Davies)