Perhaps you should try some spelling variations:
tieu sach » chieu sach, dien sach, te sach
manh tung » manh hung, thanh tung
anh tang » anh bang, anh dang, anh nang
cua dung » cua dong, qua dung, cua rung
cua dang » cua cong, cua ban
cong san » cong tac
san van » tan van, luan van, tran van
van dau » van dao, phan dau

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 - ((manh tung) or (anh tang)) ((cua dung) or (cua dang)) cong san van dau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo tieu sach - ((manh tung) OR (anh tang)) ((cua dung) OR (cua dang)) cong san van dau.
• Adding a wildcard symbol may retrieve word variants: theo tieu sach - ((manh tung) or (anh tang)) ((cua dung) or (cua dang)) cong san van dau*.