Perhaps you should try some spelling variations:
chiet tach » chieu sach
hanh tranh » canh tranh, hanh trinh, hanh trang
hoc chiet » hoc thiet, hoc nhiet, hoc hien
tranh cua » doanh cua, manh cua
dung cong » dung trong
cong luan » tong luan, cong tuan, dong luan
cua dung » cua dang, cua dong, qua dung
chat cao » chat cho, chat bao, chat cam
chat co » thuat co, chat cua, chat deo

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 dung cong luan ((chat cao) or (chat co))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chiet tach - hanh tranh cua dung cong luan ((chat cao) OR (chat co)).
• Adding a wildcard symbol may retrieve word variants: hoc chiet tach - hanh tranh cua dung cong luan ((chat cao) or (chat co))*.