Perhaps you should try some spelling variations:
canh trinh » canh tranh, hanh trinh, anh trinh
cuong dung » tuong duong, ung dung, thong dung
canh tinh » hanh tinh, manh tinh, canh tranh
dung cong » dung trong
cong luan » tong luan, cong tuan, dong luan
luan phan » luan van, luan hoan
chi xanh » chi anh, chi danh, chi hanh
phan cau » phan dau, phan cac, phan tu
doi chi » doi khi

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: doi chi xanh - ((canh trinh) OR (canh tinh)) cuong dung cong luan phan cau~.
• Adding a wildcard symbol may retrieve word variants: doi chi xanh - ((canh trinh) or (canh tinh)) cuong dung cong luan phan cau*.