Perhaps you should try some spelling variations:
theo chieu » theo tieu, theo chu, thi chieu
hanh trang » thanh trung, canh tranh, hanh trinh
hanh mang » nhanh mang, nhanh lang, thanh hang
dung cong » dung trong
cong luan » tong luan, cong tuan, dong luan
ho chieu » hoc thieu, doi chieu, mot chieu
cua dung » cua dang, cua dong, qua dung

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((theo chieu) OR (ho chieu)) xanh - ((hanh mang) or (hanh trang)) cua dung cong luan van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo chieu) OR (ho chieu)) xanh - ((hanh mang) OR (hanh trang)) cua dung cong luan van ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((theo chieu) OR (ho chieu)) xanh - ((hanh mang) or (hanh trang)) cua dung cong luan van ban".
• Adding a wildcard symbol may retrieve word variants: ((theo chieu) OR (ho chieu)) xanh - ((hanh mang) or (hanh trang)) cua dung cong luan van ban*.