Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
chieu xanh » chieu sang, chieu tinh
thanh tung » thanh cong
nhung cong » dung cong, thong cong, hang cong
hieu manh » hieu nganh, dieu hanh, hien hanh
cua nhung » va nhung
tung cua » trung cua, tuong cua, dung cua
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((((hieu manh) OR (chieu xanh))) or (chieu sach)) - thanh tung cua nhung cong dan toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((((hieu manh) OR (chieu xanh))) OR (chieu sach)) - thanh tung cua nhung cong dan toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((((hieu manh) OR (chieu xanh))) or (chieu sach)) - thanh tung cua nhung cong dan toan ban".
• Adding a wildcard symbol may retrieve word variants: hoc ((((hieu manh) OR (chieu xanh))) or (chieu sach)) - thanh tung cua nhung cong dan toan ban*.