Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
hanh tranh » canh tranh, hanh trinh, hanh trang
tong luan » tang luan, dung luan, hang luan
luan phan » luan van, luan hoan
theo yeu » theo tieu, thiet yeu, theo chu
cua dung » cua dong, qua dung, cua rung
cua dang » cua cong, cua ban

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: ((theo yeu) OR (theo chieu)) xanh - hanh tranh ((cua dung) OR (cua dang)) tong luan phan tu~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((theo yeu) or (theo chieu)) xanh - hanh tranh ((cua dung) OR (cua dang)) tong luan phan tu~".
• Adding a wildcard symbol may retrieve word variants: ((theo yeu) or (theo chieu)) xanh - hanh tranh ((cua dung) OR (cua dang)) tong luan phan tu*.