Perhaps you should try some spelling variations:
cong thanh » dong thanh, cong trinh, cong tan
chieu xanh » chieu sach, chieu sang, chieu tinh
doi chieu » doc hieu, doi chi, ho chieu
canh van » can van, cach van, canh dan
cua dung » cua dang, cua dong, qua dung
cong tac » cong ty
toan cao » toan ban, toan tap
anh van » anh va, thanh van, doanh van

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 van) or (anh van)) cua dung ((cong tac) or (cong thanh)) toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu xanh - ((canh van) OR (anh van)) cua dung ((cong tac) OR (cong thanh)) toan cao.
• Adding a wildcard symbol may retrieve word variants: doi chieu xanh - ((canh van) or (anh van)) cua dung ((cong tac) or (cong thanh)) toan cao*.