Perhaps you should try some spelling variations:
cdieu hanh » chieu xanh, deu hanh, dieu danh
hanh trinh » canh tranh, hanh chinh
tong cong » trong cong, cong cong, dung cong
trinh ha » trinh han, trinh hoa, trinh nha
dan than » dan chan, ban than, dan toan
van than » van thanh, van thang, van tuan
ha tong » han tong, ha dong, ha tang

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc ((dieu hanh) or (cdieu hanh)) - hanh trinh ha tong cong ((dan than) or (van than)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((dieu hanh) OR (cdieu hanh)) - hanh trinh ha tong cong ((dan than) OR (van than)) cau.
• Adding a wildcard symbol may retrieve word variants: doc ((dieu hanh) or (cdieu hanh)) - hanh trinh ha tong cong ((dan than) or (van than)) cau*.