Perhaps you should try some spelling variations:
hoc sach » hoc sinh, hoc cac, hoc anh
sang tao » hang tai
va thanh » gia thanh, ban thanh, va tinh
ban hang » ngan hang
sach ky » sac ky, sach y, sach ty
hieu va » lieu va, hieu qua
hai cua » thai cua, dai cua, hoi cua
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: hoc sach ky ((nang cao) or (sang tao)) hoa. hieu va cam xuc ((va thanh) or (ban hang)) hai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sach ky ((nang cao) OR (sang tao)) hoa. hieu va cam xuc ((va thanh) OR (ban hang)) hai cua tre.
• Adding a wildcard symbol may retrieve word variants: hoc sach ky ((nang cao) or (sang tao)) hoa. hieu va cam xuc ((va thanh) or (ban hang)) hai cua tre*.