Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
hanh tranh » canh tranh, hanh trinh, hanh trang
duong cong » luong cong, duong trong, trong cong
doi chieu » doc hieu, doi chi, ho chieu
tranh qua » tranh cua, thanh qua, trinh qua
dung cong » dung trong
tao cao » bao cao, toan cao

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 qua ((duong cong) OR (dung cong)) sang ((tao sau) or (tao cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu xanh - hanh tranh qua ((duong cong) OR (dung cong)) sang ((tao sau) OR (tao cao)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu xanh - hanh tranh qua ((duong cong) OR (dung cong)) sang ((tao sau) or (tao cao))".
• Adding a wildcard symbol may retrieve word variants: doi chieu xanh - hanh tranh qua ((duong cong) OR (dung cong)) sang ((tao sau) or (tao cao))*.