There seems to be errors/bugs in this course. Please check the keyboard entry questions for the following:
ư + dấu huyền = cừ
ư + dấu ngã = cữ
ư + dấu nặng = cự
When it prompts me to enter the answer for the above. I type the correct answer (as indicated in bold above), but the lesson still marks it as incorrect. (see screenprints)
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when this happens, I am prompted to type the answer again, when I do, I am not able to click on ‘next’. I must click on ‘see answer’ to continue with the lesson. Annoying.