Perhaps you should try some spelling variations:
canh trinh » hanh trinh, canh tinh, anh trinh
thong cong » trong cong, tong cong, thong thong
hien manh » hien hanh, tien manh, hien nhanh
hieu manh » chieu xanh, hieu nganh, dieu hanh
cong sat » cong suat, cong san, cong hat
sat hang » dat hang, mat hang, sat mang
hang dau » hang va, hang tai

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((hien manh) OR (hieu manh)) - ((canh trinh) or (canh tranh)) he thong cong sat hang dau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien manh) OR (hieu manh)) - ((canh trinh) OR (canh tranh)) he thong cong sat hang dau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hien manh) OR (hieu manh)) - ((canh trinh) or (canh tranh)) he thong cong sat hang dau".
• Adding a wildcard symbol may retrieve word variants: hoc ((hien manh) OR (hieu manh)) - ((canh trinh) or (canh tranh)) he thong cong sat hang dau*.