Perhaps you should try some spelling variations:
ban hanh » ban hang
tham xuc » tham nuoc, tham thuc, pham duc
te sach » toc sach
va tham » van tham, va cham, va thanh
ban anh » ban banh, ban danh, bang anh
hieu va » lieu va, hieu qua
sach ty » sach y, sach tu, sach thu
nang co » nang cao, nang doc, nang noi
cua tre » cua te, cuu tre, cua triet
nang o » nang ho, nang ro, nang x

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ty ((nang o) or (nang co)) hai. hieu va tham xuc ((ban anh) OR (ban hanh)) dai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty ((nang o) OR (nang co)) hai. hieu va tham xuc ((ban anh) OR (ban hanh)) dai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ty ((nang o) or (nang co)) hai. hieu va tham xuc ((ban anh) OR (ban hanh)) dai cua tre".
• Adding a wildcard symbol may retrieve word variants: te sach ty ((nang o) or (nang co)) hai. hieu va tham xuc ((ban anh) OR (ban hanh)) dai cua tre*.