Perhaps you should try some spelling variations:
chat thuc » thuat thuc, nhan thuc, chat thai
thu sach » tu sach, thuat sach, thuoc sach
hieu cao » chieu cao, hieu ca, kieu cao
hieu cac » hieu luc, hieu va, hieu van
tang xa » trang xa, tang ma, lang xa
sach ky » sac ky, sach y, sach ty
ky tang » ky nang, ky dang, kho tang
va dinh » van dinh, va kinh, va tinh
cua tre » cua te, cuu tre, cua triet
va dan » ca dan, va dao, va dau

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach ky tang xa hoi. ((hieu cao) or (hieu cac)) chat thuc ((va dinh) or (va dan)) dai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky tang xa hoi. ((hieu cao) OR (hieu cac)) chat thuc ((va dinh) OR (va dan)) dai cua tre.
• Adding a wildcard symbol may retrieve word variants: thu sach ky tang xa hoi. ((hieu cao) or (hieu cac)) chat thuc ((va dinh) or (va dan)) dai cua tre*.