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when, at what time
☊
giờ phút nào
☊
when, at what time
☊
khi nào
☊
when, at what time
☊
lúc nào
☊
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when, at what time ☊ 
giờ phút nào ☊ when, at what time ☊ khi nào ☊ when, at what time ☊ lúc nào ☊