Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
trong quan » thong quan, tong quan, thong quang
trang qua » trong qua, trang tuan, trung quan
ho chieu » theo chieu, hoc thieu, doi chieu
ban toan » bai toan, ban than, van toan
van tuan » van quan, van ban, anh tuan

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