Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
thong cong » trong cong, tong cong, thong thong
doi chieu » doc hieu, doi chi, ho chieu
thong cua » thong quan, thong tu, huong cua
mang cua » manh cua, dung cua, ban cua
cong dan » cong san, cong tan, huong dan
dan than » dan chan, ban than, van than
than man » than ma, thanh san, tran manh

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi chieu sach - hanh ((thong cua) or (mang cua)) thong cong dan than man~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sach - hanh ((thong cua) OR (mang cua)) thong cong dan than man.
• Adding a wildcard symbol may retrieve word variants: doi chieu sach - hanh ((thong cua) or (mang cua)) thong cong dan than man*.