Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
doi chieu » doc hieu, doi chi, ho chieu
cac duong » cau duong, cac tuong, cac dong
dao thanh » ban thanh, tro thanh, de thanh
cac dung » cach dung, tac dung, cac dang
dao than » dan than, dao thai, bao thang

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 tranh ((cac dung) or (cac duong)) nguoi ((dao than) OR (dao thanh)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu xanh - canh tranh ((cac dung) OR (cac duong)) nguoi ((dao than) OR (dao thanh)) cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu xanh - canh tranh ((cac dung) or (cac duong)) nguoi ((dao than) OR (dao thanh)) cau".
• Adding a wildcard symbol may retrieve word variants: doi chieu xanh - canh tranh ((cac dung) or (cac duong)) nguoi ((dao than) OR (dao thanh)) cau*.