Perhaps you should try some spelling variations:
thanh tung » thanh cong
tieu sach » chieu sach, dien sach, te sach
tung luan » dung luan, tang luan, tong luan
tan thanh » tran thanh, tang thanh, toan thanh
ban cong » bang cong, phan cong, ban huong
van cong » van dong, van phong, phan cong
tan than » tan tran, ban than, tam than

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo tieu sach - thanh tung luan ((ban cong) or (van cong)) ((tan than) or (tan thanh)) cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo tieu sach - thanh tung luan ((ban cong) OR (van cong)) ((tan than) OR (tan thanh)) cap.
• Adding a wildcard symbol may retrieve word variants: theo tieu sach - thanh tung luan ((ban cong) or (van cong)) ((tan than) or (tan thanh)) cap*.