Perhaps you should try some spelling variations:
thieu sach » thien hach, hieu cach, theo sach
chieu sach » chinh sach, chiet tach, chieu sang
luan chong » luan chung, luan cong, luan phong
chong cong » cong cong, thong cong, cuong cong
hanh tang » hanh trang, anh tang, hanh mang
tang luan » dung luan
cong dan » cong san, cong tan, huong dan
toan cao » toan ban
toan tap » toan 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 ((thieu sach) or (chieu sach)) - hanh tang luan chong cong dan ((toan cao) or (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu sach) OR (chieu sach)) - hanh tang luan chong cong dan ((toan cao) OR (toan tap)).
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu sach) or (chieu sach)) - hanh tang luan chong cong dan ((toan cao) or (toan tap))*.