Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu tinh, hieu manh
chieu sang » chieu sach, hieu lang, nhieu tang
lan doanh » van doanh, lan oanh, lap doanh
cong manh » cong danh, duong manh, cong thanh
cua dung » cua dang, cua dong, cua rung
qua dung » quang dung, su dung, qua song
manh van » anh van, menh van, canh van

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((chieu xanh) or (chieu sang)) - lan doanh ((cua dung) OR (qua dung)) cong manh van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu xanh) OR (chieu sang)) - lan doanh ((cua dung) OR (qua dung)) cong manh van ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chieu xanh) or (chieu sang)) - lan doanh ((cua dung) OR (qua dung)) cong manh van ban".
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu xanh) or (chieu sang)) - lan doanh ((cua dung) OR (qua dung)) cong manh van ban*.