Citizen from some countries as below which still can be issued Vietnam visa if they have company organization to make guarantee for their staying or working in Vietnam with service fee is 250$ for a 1 month single entry visa

1. Iran
2. Iraq
3. Nigeria (Country which can not be issued Vietnam visa)
4. Saudi Arabia
5. Pakistan
6. Lebanon
7. Bangladesh
8. Sri Lanka
9. Malawi
10. Palestine
11. Tunisia
12. Turkey
13. Guinea - Bissau
14. Qatar
15. Ghana
16. Omar
17. Kenya
18. Algeria
19. Libya
20. Angola
21. Morocco
22. Tanzania
23. Kuwait
24. Afghanistan
25. Cameroon
26. Domiican Republic
27. Haiti
28. Jamaica
29. Nepal
30. Namibia
31. Rwanda
32. Somali
33. Sudan
34. Trinidad and Tobago
35. United Arab Emirates (UAE)
36. Yemen
37. Zimbabwe
38. Mauritius

Due to the difficulty of getting Vietnam visa caused by the differences of diplomacy policy between Vietnam and above countries, you have to pay more money to get a visa.

Vietnam Immigration Department,