Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
chuong cua » chuong chua, chung cua, cuong cua
nhung cong » dung cong, thong cong, hang cong
doi chieu » doc hieu, doi chi, ho chieu
huong cua » dung cua
cong tac » cong ty
toan cao » toan ban
toan tap » toan ban

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

• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu xanh - nhanh ((chuong cua) OR (huong cua)) nhung cong tac ((toan cao) OR (toan tap))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu xanh - nhanh ((chuong cua) OR (huong cua)) nhung cong tac ((toan cao) or (toan tap))~".
• Adding a wildcard symbol may retrieve word variants: doi chieu xanh - nhanh ((chuong cua) OR (huong cua)) nhung cong tac ((toan cao) or (toan tap))*.