Perhaps you should try some spelling variations:
thanh hai » thanh phan, thanh hoa, thanh san
toc sach » hoc sach, doc sach, thuoc sach
va thanh » gia thanh, ban thanh, va tinh
hai cua » thai cua, dai cua, hoi cua
cao duc » dao duc, cao suc, giao duc
cac duc » cac du, cac dac, cac nuoc
hieu va » lieu va, hieu qua
sang ma » tang ma, nang ma, sang tao
sang xa » song xa, lang xa, mang xa
cua tre » cua te, cuu tre, cua triet

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: toc sach y ((sang xa) OR (sang ma)) hoi. hieu va ((cac duc) OR (cao duc)) va thanh hai cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach y ((sang xa) or (sang ma)) hoi. hieu va ((cac duc) OR (cao duc)) va thanh hai cua tre~".
• Adding a wildcard symbol may retrieve word variants: toc sach y ((sang xa) or (sang ma)) hoi. hieu va ((cac duc) OR (cao duc)) va thanh hai cua tre*.