Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu sang » chieu sach, chieu xanh, hieu lang
cua hang » cua nhung, cua cong, cua ban
cua dang » cua cong, cua ban
cong san » cong tac
san tuan » van tuan, san luan, san quan
tuan tai » toan tai, quan tai, tan tai

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi ((chinh sach) or (chieu sang)) - thanh trung ((cua hang) OR (cua dang)) cong san tuan tai~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chinh sach) OR (chieu sang)) - thanh trung ((cua hang) OR (cua dang)) cong san tuan tai.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((chinh sach) or (chieu sang)) - thanh trung ((cua hang) OR (cua dang)) cong san tuan tai".
• Adding a wildcard symbol may retrieve word variants: doi ((chinh sach) or (chieu sang)) - thanh trung ((cua hang) OR (cua dang)) cong san tuan tai*.