Perhaps you should try some spelling variations:
hanh truong » hanh trong, anh truong, manh truong
truong hoi » truong hoc, truong khoa, truong dai
tieu sach » chieu sach, dien sach, te sach
dang cong » dung cong
van khanh » van thanh, van hanh, van anh
hoi dang » hoi dan, hoi lang, hoi dong
dan toan » van toan, dan than, manh toan

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: theo tieu sach - hanh truong hoi dang cong ((dan toan) or (van khanh)) ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo tieu sach - hanh truong hoi dang cong ((dan toan) OR (van khanh)) ban.
• Adding a wildcard symbol may retrieve word variants: theo tieu sach - hanh truong hoi dang cong ((dan toan) or (van khanh)) ban*.