Perhaps you should try some spelling variations:
nhuong cong » nhung cong, luong cong, duong cong
van nhuong » van chuong, van phuong, van huong
hanh tran » hanh trang, thanh tran, hanh tram
tran van » luan van
tan toan » tan tran, tap toan, dan toan
van toan » van tuan, van tan, van thanh
do dien » doi dien, co dien, duoc dien
o dien » co dien

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((do dien) or (o dien)) sach - hanh tran van nhuong cong ((tan toan) OR (van toan)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((do dien) OR (o dien)) sach - hanh tran van nhuong cong ((tan toan) OR (van toan)) cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((do dien) or (o dien)) sach - hanh tran van nhuong cong ((tan toan) OR (van toan)) cao".
• Adding a wildcard symbol may retrieve word variants: ((do dien) or (o dien)) sach - hanh tran van nhuong cong ((tan toan) OR (van toan)) cao*.