Perhaps you should try some spelling variations:
hieu nganh » vien nganh, hiem ngan, nghiep nganh
nong huong » cong huong, dong huong, cong thuong
hieu manh » chieu xanh, dieu hanh, hien hanh
hanh dinh » thanh dinh, hinh dinh, hanh tinh
dinh cuu » dinh chi
cuu nong » cuu cong, cuu nang, cuu tong
dan toan » van toan, manh toan, xuan toan
dan than » dan chan, ban than, van than

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

• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hieu manh) OR (hieu nganh)) - hanh dinh cuu nong huong ((dan toan) OR (dan than)) tap~.
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu manh) or (hieu nganh)) - hanh dinh cuu nong huong ((dan toan) or (dan than)) tap*.