Vietnamese wordtự trau dồiIn your course · Chapter 33Part of speechverbLevelB1Meaningsto improve one's own knowledge or skillsSource: Tonada courseRelated wordsbuổi biểu diễnperformance sessionbuổi tậppractice sessionbướcstep in a procedurebắt buộcmandatorybằng cấpeducational qualificationscam kếtcommitment; to commitcho biếtto let someone knowcho phépto permit; to allow