Perhaps you should try some spelling variations:
truong quan » trong quan, thong quan, luong quan
chieu xanh » chieu sach, chieu sang, chieu tinh
truong cao » truong dai
nhung cong » dung cong, thong cong, hang cong
ho chieu » theo chieu, hoc thieu, doi chieu
ban toan » ban than, van toan, bao toan
bai toan » bai tap

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ho chieu xanh - thanh ((truong quan) or (truong cao)) nhung cong ((ban toan) OR (bai toan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu xanh - thanh ((truong quan) OR (truong cao)) nhung cong ((ban toan) OR (bai toan)) cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu xanh - thanh ((truong quan) or (truong cao)) nhung cong ((ban toan) OR (bai toan)) cau".
• Adding a wildcard symbol may retrieve word variants: ho chieu xanh - thanh ((truong quan) or (truong cao)) nhung cong ((ban toan) OR (bai toan)) cau*.