Perhaps you should try some spelling variations:
hieu nganh » vien nganh, nghiep nganh
thanh chau » thanh cha, thanh cham, thanh chu
hieu manh » chieu xanh, dieu hanh, hien hanh
hiem ngan » kim ngan, viem gan
canh tinh » hanh tinh, manh tinh, canh tranh
tong cong » trong cong, cong cong, dung cong
ban thanh » ban hanh, ban hang
cong ban » cong bang, cong san, cong tan
tinh he » trinh he, hinh he, tinh ha
he tong » he thong, he trong, he cong

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((hieu manh) or (((hieu nganh) or (hiem ngan)))) - canh tinh he tong cong ban thanh chau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hieu manh) OR (((hieu nganh) OR (hiem ngan)))) - canh tinh he tong cong ban thanh chau.
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu manh) or (((hieu nganh) or (hiem ngan)))) - canh tinh he tong cong ban thanh chau*.