Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu tinh, hieu manh
chieu sang » chieu sach, hieu lang, nhieu tang
hanh tranh » canh tranh, hanh trinh, hanh trang
nhung cong » dung cong, thong cong, hang cong
tranh cua » doanh cua, manh cua
bang cong » dang cong, bang song, hang cong
dan than » dan chan, ban than, van than
than cau » toan cau, phan cau, than cap

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc ((chieu xanh) OR (chieu sang)) - hanh tranh cua ((nhung cong) or (bang cong)) dan than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((chieu xanh) OR (chieu sang)) - hanh tranh cua ((nhung cong) OR (bang cong)) dan than cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc ((chieu xanh) OR (chieu sang)) - hanh tranh cua ((nhung cong) or (bang cong)) dan than cau".
• Adding a wildcard symbol may retrieve word variants: doc ((chieu xanh) OR (chieu sang)) - hanh tranh cua ((nhung cong) or (bang cong)) dan than cau*.