Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
thong cong » trong cong, tong cong, thong thong
hieu manh » chieu xanh, hieu nganh, dieu hanh
cua thong » cua thuong, cua khong, cua tong
anh hang » anh hoang, anh hung, anh bang
hang cua » mang cua, hang ca, huong cua
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: theo ((chieu sach) or (hieu manh)) - anh hang cua thong cong dan van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu sach) OR (hieu manh)) - anh hang cua thong cong dan van ban.
• Adding a wildcard symbol may retrieve word variants: theo ((chieu sach) or (hieu manh)) - anh hang cua thong cong dan van ban*.