Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
hanh trinh » hanh chinh
quang dung » quang trung, ung dung, cuong dung
dung cong » dung trong
ho chieu » theo chieu, hoc thieu, doi chieu
tap toan » tap doan, bai toan
tap quan » tac quan, hai quan

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