Perhaps you should try some spelling variations:
tieu sach » chieu sach, dien sach, te sach
hang cong » dang cong, hang nong, bang cong
dung cong » dung trong
nhan dan » phan dau, gian dan, nhan tai
dan cua » dan ca, ban cua, dai cua
tan han » tan nhan, tran han, tan van
han tap » han tai, toan tap, nhan tai

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 - nhan dan cua ((hang cong) or (dung cong)) tan han tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo tieu sach - nhan dan cua ((hang cong) OR (dung cong)) tan han tap.
• Adding a wildcard symbol may retrieve word variants: theo tieu sach - nhan dan cua ((hang cong) or (dung cong)) tan han tap*.