Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
hanh tranh » canh tranh, hanh trinh, hanh trang
doi chieu » doc hieu, doi chi, ho chieu
tong cong » trong cong, cong cong, dung cong
tranh va » tranh van, trang va, trinh va
cong dan » cong san, cong tan, huong dan
toan cao » toan tap
toan ban » van ban
va tong » va thong, va tuong, va trong

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 - hanh tranh va tong cong dan ((toan cao) OR (toan ban))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu xanh - hanh tranh va tong cong dan ((toan cao) OR (toan ban))".
• Adding a wildcard symbol may retrieve word variants: doi chieu xanh - hanh tranh va tong cong dan ((toan cao) OR (toan ban))*.