Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu sach » chiet tach, chieu sang, chieu xanh
trung cua » truong cua, trung tuan, trung cap
tong cong » trong cong, cong cong, dung cong
cua tong » cua cong, cua dong, cua nong
dan canh » van canh, dan cach, dan hanh
dan can » dan chan, dan ca, ban can

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 ((chieu sach) OR (chinh sach)) - thanh trung cua tong cong ((dan can) OR (dan canh)) cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chieu sach) OR (chinh sach)) - thanh trung cua tong cong ((dan can) or (dan canh)) cau~".
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sach) OR (chinh sach)) - thanh trung cua tong cong ((dan can) or (dan canh)) cau*.