Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
thong cong » trong cong, tong cong, thong thong
hoc chieu » hoc thieu, ho chieu, hoc hien
cong dan » cong san, cong tan, huong dan
dan phan » doan phan, dan chan, van phan
phan dau » phan tu, hang dau
son he » son le, mon he, son ve
son ha » son hai, son la

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 - thanh ((son he) OR (son ha)) thong cong dan phan dau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc chieu sach - thanh ((son he) OR (son ha)) thong cong dan phan dau*".