Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu xanh » chieu sach, chieu tinh, hieu manh
chieu sang » chieu sach, hieu lang, nhieu tang
kha nang » phap nang, ky nang, ki nang
cong ban » cong bang, cong san, cong tan
ban hang » ngan hang
hang dau » hang va, hang tai
va hang » van hang, va nang, va lang

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi ((chieu xanh) OR (chieu sang)) - thanh trung ((va hang) or (kha nang)) cong ban hang dau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chieu xanh) OR (chieu sang)) - thanh trung ((va hang) OR (kha nang)) cong ban hang dau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((chieu xanh) OR (chieu sang)) - thanh trung ((va hang) or (kha nang)) cong ban hang dau".
• Adding a wildcard symbol may retrieve word variants: doi ((chieu xanh) OR (chieu sang)) - thanh trung ((va hang) or (kha nang)) cong ban hang dau*.