Section 39

The employer shall not unilaterally terminate an employment contract in the following cases:

(1)  The worker is under treatment or care as prescribed by doctors for sickness, industrial accident or occupational disease, except in the cases provided for under paragraphs (c) and (e) of subsection 38(1) of this Code;

(2)  The worker is on annual leave, on leave for personal reasons, or any other type of leave permitted by the employer;

(3)  The female worker in cases referred to under subsection 111(3) of this Code.

[...]

Section 111

[...]

(3)  The employer shall not dismiss female workers or unilaterally terminate the employment contracts of female workers because of marriage, pregnancy, maternity leave or breastfeeding a child under 12 months of age, except in cases where the enterprise ceases its activities.

[Viet Nam, Labour Code of 23 June 1994]