There are several 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 screenprint)
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.
the link to the course is: http://www.memrise.com/course/216185/vietnamese-alphabet-and-tones/garden/learn/