Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
doanh luan » doanh nhan
thong cong » trong cong, tong cong, phong chong
hoc chieu » hoc thieu, ho chieu, hoc hien
tranh cua » doanh cua, manh cua
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.

• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu sach - hanh ((tranh cua) OR (doanh luan)) ((thong cong) OR (thong thong)) dan toan ban~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc chieu sach - hanh ((tranh cua) or (doanh luan)) ((thong cong) OR (thong thong)) dan toan ban~".
• Adding a wildcard symbol may retrieve word variants: hoc chieu sach - hanh ((tranh cua) or (doanh luan)) ((thong cong) OR (thong thong)) dan toan ban*.