File đính kèm:
1. Kế hoạch khảo sát: https://drive.google.com/file/d/1Pl-uf-H0trhde807qolkNYx15UapbwBn/view?usp=sharing
2. Phiếu khảo sát: https://docs.google.com/document/d/16RobcuPMTMmNcZldzUWKVSngbtY4cs-8/edit?usp=sharing&ouid=111640978041859757453&rtpof=true&sd=true
