- File nghe bài giảng lớp 5.2 và 6 tại Hongkong:
https://drive.google.com/drive/folders/1jI5qwAuDkijpbPKX5nY14TIyLtTmcd8W?usp=sharing. - File nghe bài giảng lớp 6 tại Sài gòn:
https://drive.google.com/drive/folders/1h5ZijQ55vZ-d90MWccrSlrQTaopJ7E4Y?usp=sharing. - File nghe bài giảng lớp 6 tại Hà Nội:
https://drive.google.com/drive/folders/17OkEJcEDlV4pKeJmxqY-reJeXhGeKQjh?usp=sharing. - File nghe bài giảng lớp 7, 7+:
https://drive.google.com/drive/folders/17nhQwjShCCHAoMK8n7o0JiBGNB8HeCSl?usp=sharing. - File nghe bài giảng lớp 11,12,13:
https://drive.google.com/file/d/1w5zk8Sl3Z1lMOF_ZvDnhE13gClDRWb4I/view?usp=sharing. - File nghe bài giảng lớp 13+, 13++:
https://drive.google.com/file/d/1q0Zy2rUJzFbhOzQZU4Xior_VKgh4IAGx/view?usp=sharing. - File nghe bài giảng lớp 16:
https://drive.google.com/file/d/1hxKWMlKLJirjEgNoYXJLsKRf7F9bhIAl/view?usp=sharing. - File nghe bài giảng lớp 17:
https://drive.google.com/file/d/1kNWMu4ykbY5E3xnDMZ-peH2wikUh2DCs/view?usp=sharing. - File nghe bài giảng lớp 17, 18 tại Sanjose:
https://drive.google.com/file/d/1A1yDSunpc1JrOMkT1Q22oQPhHxz8yueF/view?usp=sharing. - File nghe bài giảng lớp 18:
https://drive.google.com/file/d/1qPT3DsOLWyzHqMPZGlwCNsCfj7_BMb1n/view?usp=sharing. - File nghe bài giảng lớp 19 đầu tiên phần 1:
https://drive.google.com/file/d/1G6Xi8BH-o_SUu6uAb-HG6RQ6smo5eMxk/view?usp=sharing. - File nghe bài giảng lớp 19 đầu tiên phần 2:
https://drive.google.com/file/d/1EMJY0mbnzilgjakmDmf1wdOQH9K7xL1T/view?usp=sharing. - File nghe bài giảng lớp 19 tại Nam Mỹ:
https://drive.google.com/file/d/1kjZjFlYClaVCFcYGPGjL_je1J-qUQ5-j/view?usp=sharing. - File nghe bài giảng lớp 19 cho Úc và Thái Lan:
https://drive.google.com/file/d/16nR1-5JNxnTS8wYJAe8NlxbY9p0mBRah/view?usp=sharing. - File nghe bài giảng lớp 20:
https://drive.google.com/file/d/1ZJPZN5G_MOw8jz7XAK0QqXX2EC0VkVc4/view?usp=sharing - Level 20 for International Students:
https://www.youtube.com/playlist?list=PL_29hKNEYkN-ue_8hV_mahEDx5PkR2xZp
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