If the Venezuelan passport holders want to apply visa at Vietnam Embassy, they should to know that:
Visa administrative Institution: Vietnam Embassy
Processing time: depends on you how fast you need. But for sure, you should make a call to Vietnam Embassy for details.
Required Documents: passport, money and 1 new envelope with stamp on it and your exact home address in order to avoid losing issues.
How to apply: please take a look at contact information of Vietnam Embassy below
EMBASSY OF VIETNAM IN CARACAS D.C
Address: 9na Transversal, Entre 6ta y 7ma Avenidas, Quinta Las Mercedes, Altamira, Chacao 1060-025 D.F, Caracas, Venezuela
Phone: (+58) 212-635 7402
Fax: (+58) 212-264 7324