Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
dang xay » dang van, van xay
va thanh » gia thanh, va tinh, le thanh
bo sach » co sach, hoc sach
sach ky » sac ky, sach y, sach ty
hieu va » lieu va, hieu qua
lai cua » dai cua, hai cua, lai chau
cua tre » cua te, cuu tre, cua triet
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: bo sach ky ((nang x) or (dang xay)) hoi. hieu va cam xuc ((va thanh) OR (ban thanh)) lai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: bo sach ky ((nang x) OR (dang xay)) hoi. hieu va cam xuc ((va thanh) OR (ban thanh)) lai cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "bo sach ky ((nang x) or (dang xay)) hoi. hieu va cam xuc ((va thanh) OR (ban thanh)) lai cua tre*".