Perhaps you should try some spelling variations:
nhuong cong » nhung cong, luong cong, duong cong
thanh tran » thanh trang, thanh toan, thanh tra
van nhuong » van chuong, van phuong, van huong
tran van » luan van
cong tan » cong tac, cong san, cong thanh
do dien » doi dien, co dien, duoc dien
tan van » tang van, luan van, dang van
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 - thanh tran van nhuong cong tan van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((do dien) OR (o dien)) sach - thanh tran van nhuong cong tan van ban.
• Adding a wildcard symbol may retrieve word variants: ((do dien) or (o dien)) sach - thanh tran van nhuong cong tan van ban*.