Who are the top 10 richest people in Vietnam?

In Vietnam, since we still using cash so it's very hard to tell you who is the richest people, I think most of them, not sure they are entrepreneurs but government officials.
I working on Stock Market, I know the top 10 richest people base on their stocks ( September 2011)as follow:
1. Pham Nhat Vuong with more than 20,605 bil vnd on VIC, VPL
2. Doan Nguyen Duc 8,000 bil vnd on HAG
3. Dang Thanh Tam more than 7,000 bil vnd on KBC, SGT, NVB, ITA và SQC.
4. Pham Thu Huong ( richest woman on stock market ) with 3,583 bil VND
5. Pham Hoang Yen 2,918 bil VND on MSN
6. Ho Hung Anh 2,900 bil on MSN
7. Pham Thuy Hang 2,700 bil on VIC, VPL
8. Tran Dinh Long 2,300 bil on HPG
9. Nguyen Thuy Ha 2,200 bil on VIC
10. Nguyen Van Dat 1,900 bil on PDR
Most of them are shareholder from Vincom, Vinperland, Hoang Anh Gia Lai Group, Kinh Bac and Masan Group, all big and strong companies in Vietnam.
Tell me if you know some one richer than them :)