Perhaps you should try some spelling variations:
chiet tach » chieu sach
hanh tranh » canh tranh, hanh trinh, hanh trang
nhung cong » dung cong, thong cong, hang cong
hoc chiet » hoc thiet, hoc nhiet, hoc hien
tranh cua » doanh cua, manh cua
cua nhung » va nhung
cong bang » cuong bang, dong bang, hong bang
chat cao » chat co, chat cho, chat bao

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: hoc chiet tach - hanh tranh cua nhung cong bang ((chat cao) or (nhat ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chiet tach - hanh tranh cua nhung cong bang ((chat cao) OR (nhat ban)).
• Adding a wildcard symbol may retrieve word variants: hoc chiet tach - hanh tranh cua nhung cong bang ((chat cao) or (nhat ban))*.