Perhaps you should try some spelling variations:
chieu sang » chieu xanh, hieu lang, nhieu tang
chieu sach » chinh sach, chiet tach, chieu xanh
canh manh » lanh manh, canh tranh, cach mang
hang cong » dang cong, hang nong, bang cong
cong san » cong tac
manh va » hanh va, anh va, minh va
va hang » van hang, va nang, va lang
san van » tan van, luan van, tran van

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 sang) OR (chieu sach)) - canh manh va hang cong san van ban~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chieu sang) OR (chieu sach)) - canh manh va hang cong san van ban".
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sang) OR (chieu sach)) - canh manh va hang cong san van ban*.