Perhaps you should try some spelling variations:
thanh thai » thanh hai, thanh tai, nhanh thai
ban thanh » ban hanh, ban hang
thai cua » than cua, tai cuc, tri cua
te sach » toc sach
sach ty » sach y, sach tu, sach thu
cam duc » cao duc, pham duc, nam duoc
cua tre » cua te, cuu tre, cua triet
hieu va » lieu va, hieu qua
lang xa » lang ha, dang xay, lang van
tang ma » mang may, tang van

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 ty ((tang ma) OR (lang xa)) hoi. hieu va ((cam duc) OR (cam xuc)) ban thanh thai cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ty ((tang ma) or (lang xa)) hoi. hieu va ((cam duc) OR (cam xuc)) ban thanh thai cua tre~".
• Adding a wildcard symbol may retrieve word variants: te sach ty ((tang ma) or (lang xa)) hoi. hieu va ((cam duc) OR (cam xuc)) ban thanh thai cua tre*.