Under a proposal workers with with at least seven years are entitled to a salary raise of 70,000 dong (approximately $4.40). From Intellasia News:

Mass strike over wages at Nike sub-contractor factory
02/Aug/05 Nong Thon Ngay Nay, page 11

Over 8,000 workers went on strike over pay claims on July 29 at a Nike sub-contracting company Changsin Co of Korea at Thanh Phu commune in the Dong Nai district of Vinh Cuu.
The striking workers asked the executive board to reconsider the new salary regime announced on July 28. They said the provision in the wage increase document was unfair. Workers who had worked for the company under three-months are not in any wage raising list, employees working from four to 12 months will receive 30,000 dong more, employees working from one to four-years 60,000 dong more, employees working from four to seven-years 65,000 dong and employees who had worked over seven-years 70,000 dong.

Meanwhile, announced on the same day, Adidas acquires Reebok competitively placing it as the number two sportswear giant to Nike. Adidas has a store in HCMC on Hai Ba Trung Street. How long would it take to save up for a pair of 1,985,000 dong sneakers (which is nearly two months rent for me). I wouldn't know, I buy Converse in Thailand for 209 Baht ($5) and Puma at Ben Thanh Market for 200,000 dong ($12.50).

For further reading:
Some of these are old links, addressing issues existing seven years ago. I suspect things have improved. But, here they are, old and new:
• General info on Nike's investment activities in Vietnam
• Nike Shoe Plant in Vietnam Is Called Unsafe for Workers
• Nike-Viet Nam exports 750 million USD in 2004
and perhaps the strangest of all on BBC News....
• Nike slams Vietnam labour critics