Perhaps you should try some spelling variations:
sach thue » sach thieu, sach tham, cach thuc
hieu van » hieu va, thien van, lieu va
hanh dai » hanh tai, hanh dao, vanh dai
ban hanh » ban hang
sach thu » sach thieu, sach tham, cach thuc
xuc ban » duc ban, cuc ban, quoc ban
cac xuc » cam xuc, cac nuoc, chat xuc
hieu ve » hieu va
nang ma » tang ma, sang ma, nang cao
ma hoi » mai hoi, xa hoi, ma hoa
cua tu » cua tuc, cua su, cua cu

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

• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach thu) OR (sach thue)) nang ma hoi. ((hieu ve) OR (hieu van)) cac xuc ban hanh dai cua tu~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach thu) or (sach thue)) nang ma hoi. ((hieu ve) OR (hieu van)) cac xuc ban hanh dai cua tu~".
• Adding a wildcard symbol may retrieve word variants: te ((sach thu) or (sach thue)) nang ma hoi. ((hieu ve) OR (hieu van)) cac xuc ban hanh dai cua tu*.