Perhaps you should try some spelling variations:
doi chieu » doc hieu, ho chieu, mot chieu
cac duong » cau duong, cac tuong, cac dong
nguoi dao » nguoi tay
cac dung » cach dung, tac dung, cac dang
dao toan » bao toan, dan toan, dao hoan
toan cau » toan cao, toan ban, toan tap
doi chi » doi khi

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) or (doi chi)) xanh - canh tranh ((cac dung) or (cac duong)) nguoi dao toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doi chieu) OR (doi chi)) xanh - canh tranh ((cac dung) OR (cac duong)) nguoi dao toan cau.
• Adding a wildcard symbol may retrieve word variants: ((doi chieu) or (doi chi)) xanh - canh tranh ((cac dung) or (cac duong)) nguoi dao toan cau*.