Perhaps you should try some spelling variations:
trong quan » thong quan, tong quan, thong quang
chieu xanh » chieu sach, chieu sang, chieu tinh
quan dung » quang dung, quan duong, qua dung
ho chieu » theo chieu, hoc thieu, doi chieu
canh anh » canh tranh, thanh anh, canh tinh
toan cau » toan cao, toan tap, toan tai
toan ban » van ban
anh anh » thanh anh, hinh anh, minh anh

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: ho chieu xanh - ((canh anh) OR (anh anh)) quan dung trong quan ((toan cau) OR (toan ban))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu xanh - ((canh anh) OR (anh anh)) quan dung trong quan ((toan cau) or (toan ban))~".
• Adding a wildcard symbol may retrieve word variants: ho chieu xanh - ((canh anh) OR (anh anh)) quan dung trong quan ((toan cau) or (toan ban))*.