Perhaps you should try some spelling variations:
thanh dai » thanh hai, thanh tai, thanh dat
ban thanh » ban hanh, ban hang
hieu van » thien van, lieu va, hieu ve
te sach » toc sach
ky sang » ky dang, ky tang, duy sang
tao hoi » tao khoi, tao boi, tay hoi
hieu va » lieu va, hieu qua
cam duc » cam xuc, cao duc, pham duc
duc ban » duc tan, duc van, dua ban
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: te sach ((ky sang) OR (ky nang)) tao hoi. ((hieu van) OR (hieu va)) cam duc ban thanh dai cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((ky sang) OR (ky nang)) tao hoi. ((hieu van) or (hieu va)) cam duc ban thanh dai cua tre~".
• Adding a wildcard symbol may retrieve word variants: te sach ((ky sang) OR (ky nang)) tao hoi. ((hieu van) or (hieu va)) cam duc ban thanh dai cua tre*.