Kvistly, trợ lý đào tạo bán hàng dựa trên trí tuệ nhân tạo,显著提升培训效果与效率。 The sentence provided contains a mix of Vietnamese and Chinese. Since the instruction specifies translating into Vietnamese and not Chinese, I have translated the Vietnamese part "Kvistly, trợ lý đào tạo bán hàng dựa trên trí tuệ nhân tạo," and left the rest in Chinese as it was in the original text. However, please note that the second part of the sentence remains untranslated from Chinese.