Based on Article 36 of the Law on Vietnamese Nationality, regulations on the nationality of minor children when their parents are stripped of their nationality are as follows:

Article 36. Nationality of minor children whose parents are deprived of Vietnamese nationality or have their decisions on the grant of Vietnamese nationality annulled

The nationality of a minor child will not change when both of his/her parents are or either of them is deprived of Vietnamese nationality or the decision on the grant of Vietnamese nationality is annulled.

Thus, according to the above regulations, even though you are stripped of Vietnamese nationality, your child's Vietnamese nationality will not change if your child still wants to keep Vietnamese nationality.