voo zɑ̃
Here's a breakdown:
* voo: pronounced like "voo" in "food"
* zɑ̃: pronounced like "zan" in "zanier" but with a nasal "n" sound (like the "n" in "French" but without the "ch" sound).
Remember: The "s" in "vous" is silent, but it affects the pronunciation of the following "e."