Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
doi chieu » doc hieu, doi chi, ho chieu
tranh cua » doanh cua, manh cua
tong cong » trong cong, cong cong, dung cong
cong luan » tong luan, cong tuan, dong luan
khoan dau » khoan danh, khoan va, doan dau
cua tong » cua cong, cua dong, cua nong
phan dau » phan tu, hang dau

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 cua tong cong luan ((khoan dau) or (phan dau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu xanh - canh tranh cua tong cong luan ((khoan dau) OR (phan dau)).
• Adding a wildcard symbol may retrieve word variants: doi chieu xanh - canh tranh cua tong cong luan ((khoan dau) or (phan dau))*.