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May mắn là món lãi của mồ hôi. Bạn càng đổ mồ hôi, bạn càng may mắn. - Ray Kroc
Unit 1: Activities
Unit 2: Data
Unit 3: Etiquette
Unit 4: Image
Unit 5: Success
Unit 6: Future
Unit 7: Location
Unit 8: Job-seeking
Unit 9: Selling
Unit 10: Price
Unit 11: Insurance
Unit 12: Service
Unit 13: Productivity
Unit 14: Creativity
Unit 15: Motivation