Perhaps you should try some spelling variations:
tieu sach » chieu sach, dien sach, te sach
hang cong » dang cong, bang cong, thanh cong
hang nong » thang long, han tong
hanh ban » thanh ban, hang ban, hanh san
ban cua » ban quan
san van » luan van, tran van, dang van
tan van » tran van, tang van, luan van

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 - hanh ban cua ((hang cong) or (hang nong)) ((san van) OR (tan van)) ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo tieu sach - hanh ban cua ((hang cong) OR (hang nong)) ((san van) OR (tan van)) ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo tieu sach - hanh ban cua ((hang cong) or (hang nong)) ((san van) OR (tan van)) ban".
• Adding a wildcard symbol may retrieve word variants: theo tieu sach - hanh ban cua ((hang cong) or (hang nong)) ((san van) OR (tan van)) ban*.