Perhaps you should try some spelling variations:
thanh dai » thanh hai, thanh tai, thanh dat
ban thanh » ban hanh, ban hang
vu sach » vu bach, su sach, vu khach
duc ban » duc tan, duc van, dua ban
cam duc » cam xuc, cao duc, pham duc
hieu va » lieu va, hieu qua
cua tre » cua te, cuu tre, cua triet
sach ty » sach y, sach tu, sach thu
mang xa » lang xa, mang may, dang xay
nang xa » lang xa, nang ma, ang xa
va cam » va cham, va cac, va cao

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach ty ((((nang xa) or (mang xa))) or (nang x)) hoi. hieu va cam duc ban thanh dai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ty ((((nang xa) OR (mang xa))) OR (nang x)) hoi. hieu va cam duc ban thanh dai cua tre.
• Adding a wildcard symbol may retrieve word variants: vu sach ty ((((nang xa) or (mang xa))) or (nang x)) hoi. hieu va cam duc ban thanh dai cua tre*.