Perhaps you should try some spelling variations:
dong nguyen » cong nguyen, dang nguyen, dung nguyen
chieu xanh » chieu sach, chieu sang, chieu tinh
canh manh » lanh manh, cach mang, van manh
ho chieu » theo chieu, hoc thieu, doi chieu
cua dong » chua dong, cua cong, cua dang
ban can » ban dan, ban hang, ban hanh

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 manh) or (canh tranh)) cua dong nguyen van ((nang cao) or (ban can))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu xanh - ((canh manh) OR (canh tranh)) cua dong nguyen van ((nang cao) OR (ban can)).
• Adding a wildcard symbol may retrieve word variants: ho chieu xanh - ((canh manh) or (canh tranh)) cua dong nguyen van ((nang cao) or (ban can))*.