Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
thanh cua » tranh cua, hanh cua, thanh cha
dung cong » dung trong
hach toan » thanh toan, manh toan
ho chieu » theo chieu, hoc thieu, doi chieu
than cua » nhan cua, thai cua, ban cua
hai toan » bai toan, hai tan, thai doan

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 - dang ((thanh cua) or (than cua)) dung cong ((hai toan) OR (hach toan)) tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu xanh - dang ((thanh cua) OR (than cua)) dung cong ((hai toan) OR (hach toan)) tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu xanh - dang ((thanh cua) or (than cua)) dung cong ((hai toan) OR (hach toan)) tap".
• Adding a wildcard symbol may retrieve word variants: ho chieu xanh - dang ((thanh cua) or (than cua)) dung cong ((hai toan) OR (hach toan)) tap*.