Can students who attend continuing education schools in high school take university entrance exams?

According to Article 5 of the Regulation on University Admissions; College Admissions for Early Childhood Education issued together with Circular 09/2020/TT-BGDDT regarding the conditions for university admissions as follows:

Candidates who have graduated from the Vietnamese high school program (in the form of formal education or continuing education) or have graduated from intermediate level (among them, those who graduated at the intermediate level but do not have a high school diploma must study and pass the required amount of high school cultural knowledge as prescribed by the Law on Education and its guiding documents) or have graduated from a high school program abroad (which has been approved by the host country, equivalent to the high school level in Vietnam) either abroad or in Vietnam (hereinafter collectively referred to as high school graduation).

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Thus, according to this regulation, you graduating from a supplementary high school allows you to still be eligible for university admission.

Sincerely!