Perhaps you should try some spelling variations:
sach thue » sach thieu, sach tham, cach thuc
ban hanh » ban hang
sach thu » sach thieu, sach tham, cach thuc
qua cai » qua hai, qua cac, qua ca
hanh le » thanh le, hanh ve, hanh de
tuc ban » thuc ban, truc ban, tu ban
qua cao » qua cac, qua ca, qua co
lang xa » lang ha, dang xay, lang van
le cua » ly cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((sach thu) OR (sach thue)) lang xa hoi. hieu ((qua cao) or (qua cai)) tuc ban hanh le cua vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach thu) OR (sach thue)) lang xa hoi. hieu ((qua cao) OR (qua cai)) tuc ban hanh le cua vat.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach thu) OR (sach thue)) lang xa hoi. hieu ((qua cao) or (qua cai)) tuc ban hanh le cua vat".
• Adding a wildcard symbol may retrieve word variants: tu ((sach thu) OR (sach thue)) lang xa hoi. hieu ((qua cao) or (qua cai)) tuc ban hanh le cua vat*.