Perhaps you should try some spelling variations:
nhuong cong » nhung cong, luong cong, duong cong
chieu sang » chieu xanh, hieu lang, nhieu tang
chieu sach » chinh sach, chiet tach, chieu xanh
tranh luan » trinh luan, trinh luat, doanh luan
van nhuong » van chuong, van phuong, van huong
dan toan » van toan, dan than, manh toan

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi ((chieu sang) OR (chieu sach)) - tranh luan van nhuong cong ((dan toan) or (anh tuan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chieu sang) OR (chieu sach)) - tranh luan van nhuong cong ((dan toan) OR (anh tuan)) cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((chieu sang) OR (chieu sach)) - tranh luan van nhuong cong ((dan toan) or (anh tuan)) cau".
• Adding a wildcard symbol may retrieve word variants: doi ((chieu sang) OR (chieu sach)) - tranh luan van nhuong cong ((dan toan) or (anh tuan)) cau*.