Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu sach » chiet tach, chieu sang, hieu cach
chieu xanh » chieu sang, chieu tinh, hieu manh
khong cong » thong cong, khong cang, chong cong
trung cua » truong cua, trung tuan, trung cap
cua khong » hua khong, cua phuong, cua thuong
cong dan » cong san, cong tan, huong dan
dan van » dang van, doan van, dao 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 sach) or (chieu xanh))) or (chinh sach)) - thanh trung cua khong cong dan van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((((chieu sach) OR (chieu xanh))) OR (chinh sach)) - thanh trung cua khong cong dan van ban.
• Adding a wildcard symbol may retrieve word variants: hoc ((((chieu sach) or (chieu xanh))) or (chinh sach)) - thanh trung cua khong cong dan van ban*.