Perhaps you should try some spelling variations:
thieu sach » chieu sach, thien hach, hieu cach
chiet tach » chieu sach
hanh tranh » canh tranh, hanh trinh, hanh trang
thong cong » trong cong, tong cong, thong thong
tranh cua » doanh cua, manh cua
cua thong » cua thuong, cua khong, cua tong
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 (chiet tach)) - hanh tranh cua thong cong dan ((toan cao) or (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu sach) OR (chiet tach)) - hanh tranh cua thong cong dan ((toan cao) OR (toan tap)).
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu sach) or (chiet tach)) - hanh tranh cua thong cong dan ((toan cao) or (toan tap))*.