with open('src/main/resources/templates/doctor.html', 'r', encoding='utf-8') as f:
    text = f.read()

import re
# Find the start of the dropdown buttons container
match = re.search(r'--Theo chuyên khoa--.*?</div>', text, re.DOTALL)
if match:
    start_idx = text.rfind('<button', 0, match.start())
    end_idx = text.find('</button>', match.end()) + 9
    print(text[start_idx:end_idx + 1000]) # Print the button and following content