Perhaps you should try some spelling variations:
hieu manh » chieu xanh, hieu nganh, hien hanh
manh hung » anh huong
hua khong » hoa khong, cua khong, hoac khong
cong manh » cong danh, duong manh, cong thanh
manh toan » thanh toan, anh tuan, tinh toan
cua tong » cua cong, cua dong, cua nong
toan cao » toan ban, toan tap

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 (dieu hanh)) - manh hung ((cua tong) or (hua khong)) cong manh toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hieu manh) OR (dieu hanh)) - manh hung ((cua tong) OR (hua khong)) cong manh toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hieu manh) OR (dieu hanh)) - manh hung ((cua tong) or (hua khong)) cong manh toan cao".
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu manh) OR (dieu hanh)) - manh hung ((cua tong) or (hua khong)) cong manh toan cao*.