Perhaps you should try some spelling variations:
chiet tach » chieu sach
chieu sang » chieu sach, chieu xanh, hieu lang
canh manh » lanh manh, canh tranh, cach mang
dung cong » dung trong
manh cua » doanh cua, ban cua
cua dung » cua dang, cua dong, qua dung
cong san » cong tac
pham dau » phan dau, pham dat, phap dau
pham dac » pham duc, pham dang, pham sach

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chiet tach) OR (chieu sang)) - canh manh cua dung cong san ((pham dau) OR (pham dac))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chiet tach) or (chieu sang)) - canh manh cua dung cong san ((pham dau) OR (pham dac))~".
• Adding a wildcard symbol may retrieve word variants: ho ((chiet tach) or (chieu sang)) - canh manh cua dung cong san ((pham dau) OR (pham dac))*.