Perhaps you should try some spelling variations:
chieu sach » chiet tach, chieu sang, hieu cach
chieu xanh » chieu sang, chieu tinh, hieu manh
hanh trung » thanh trung, hanh trang, manh trung
nhung cong » dung cong, thong cong, hang cong
trung cua » truong cua, trung tuan, trung cap
cua nhung » va nhung
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)) - hanh trung cua nhung 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)) - hanh trung cua nhung cong dan van ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((((chieu sach) OR (chieu xanh))) or (chinh sach)) - hanh trung cua nhung cong dan van ban".
• Adding a wildcard symbol may retrieve word variants: hoc ((((chieu sach) OR (chieu xanh))) or (chinh sach)) - hanh trung cua nhung cong dan van ban*.