Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
canh trinh » canh tranh, hanh trinh, canh tinh
doi chieu » doc hieu, doi chi, ho chieu
bang cong » dang cong, bang song, dung cong
hang cong » dang cong, hang nong, thanh cong
manh toan » thanh toan, anh tuan, tinh toan
trinh va » trinh van, trinh vat, trinh ve
dan toan » van toan, dan than, xuan toan

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 - canh trinh va ((bang cong) or (hang cong)) ((dan toan) OR (manh toan)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu xanh - canh trinh va ((bang cong) OR (hang cong)) ((dan toan) OR (manh toan)) cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu xanh - canh trinh va ((bang cong) or (hang cong)) ((dan toan) OR (manh toan)) cao".
• Adding a wildcard symbol may retrieve word variants: doi chieu xanh - canh trinh va ((bang cong) or (hang cong)) ((dan toan) OR (manh toan)) cao*.