Perhaps you should try some spelling variations:
thieu sach » chieu sach, thien hach, theo sach
thanh tinh » thanh binh, nhanh tinh, than kinh
hieu cach » hieu cac, chieu sach, hieu ca
tinh cua » trinh cua, sinh cua, tinh chat
cua hang » cua dang, cua nhung, cua cong
nong van » song van, nong dan, tong van
nong san » cong san, dong san, nong dan
tang ban » tang bang, tiang ban, tang van

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((thieu sach) or (hieu cach)) - thanh tinh cua hang ((nong van) OR (nong san)) tang ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu sach) OR (hieu cach)) - thanh tinh cua hang ((nong van) OR (nong san)) tang ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu sach) or (hieu cach)) - thanh tinh cua hang ((nong van) OR (nong san)) tang ban".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu sach) or (hieu cach)) - thanh tinh cua hang ((nong van) OR (nong san)) tang ban*.