Perhaps you should try some spelling variations:
dong nguon » dung nguon, cong nguon, luong nguon
chieu xanh » chieu sach, chieu sang, chieu tinh
canh manh » lanh manh, cach mang, van manh
nguon van » nguon von, nguoi van, nguyen van
ho chieu » theo chieu, hoc thieu, doi chieu
bang cau » hang cau, bang cac, nang cao
ha dong » hoat dong, van dong
ban cau » ban can, van cau, ban dau

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