1) Chuyên đề 1:
https://drive.google.com/file/d/1VVdRddBmHxQO7ibuVqWlAtul2TrYb1j1/view?usp=sharing
2) Chuyên đề 2: https://drive.google.com/file/d/1YNY03YlRe2rjm5S7PFJ_liRlvCFDfBUs/view?usp=sharing