| Ratio | Surname | % Correct |
|---|---|---|
| 1:4 | Nguyễn | 96%
|
| 1:12 | Trần | 74%
|
| 1:13 | Lê | 64%
|
| 1:20 | Phạm | 55%
|
| 1:74 | Hồ | 49%
|
| 1:63 | Đỗ | 45%
|
| 1:41 | Vũ | 45%
|
| 1:67 | Ngô | 40%
|
| 1:47 | Bùi | 38%
|
| 1:61 | Huỳnh | 36%
|
| 1:46 | Phan | 36%
|
| 1:54 | Võ | 36%
|
| 1:78 | Đặng | 34%
|
| 1:32 | Hoàng | 34%
|
| 1:74 | Trương | 30%
|