Perhaps you should try some spelling variations:
khong cong » thong cong, khong cang, chong cong
hieu manh » chieu xanh, hieu nganh, hien hanh
hanh tang » hanh trang, anh tang, hanh mang
cua khong » hua khong, cua phuong, cua thuong
tang cua » mang cua, hang cua, tang luan
dan toan » van toan, dan than, manh toan

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)) - hanh tang cua khong cong ((dan toan) or (anh tuan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hieu manh) OR (dieu hanh)) - hanh tang cua khong cong ((dan toan) OR (anh tuan)) cau.
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu manh) or (dieu hanh)) - hanh tang cua khong cong ((dan toan) or (anh tuan)) cau*.