Perhaps you should try some spelling variations:
hieu nganh » vien nganh, hiem ngan, nghiep nganh
hieu manh » chieu xanh, dieu hanh, hien hanh
canh tinh » hanh tinh, manh tinh, canh tranh
dung cong » dung trong
thanh cac » hanh cac, thanh bac, thanh ca
tinh cua » trinh cua, sinh cua, tinh chat
cua dung » cua dang, cua dong, qua dung
cong dan » cong san, cong tan, huong dan
phan cau » phan dau, phan cac, phan tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc ((hieu nganh) or (hieu manh)) - canh tinh cua dung cong dan ((thanh cac) or (phan cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((hieu nganh) OR (hieu manh)) - canh tinh cua dung cong dan ((thanh cac) OR (phan cau)).
• Adding a wildcard symbol may retrieve word variants: doc ((hieu nganh) or (hieu manh)) - canh tinh cua dung cong dan ((thanh cac) or (phan cau))*.