Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
chat thuc » thuat thuc, nhan thuc, chat thai
day danh » day manh, dai danh, dao danh
ha manh » ho manh, ha anh, ha thanh
va chat » van chat, va phat, cao chat
sach ky » sac ky, sach y, sach ty
hieu va » lieu va, hieu qua
lang xa » lang ha, dang xay, lang van
nang xa » nang x, nang ma, mang xa
cua tre » cua te, cuu tre, cua triet

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuoc sach ky ((nang xa) OR (lang xa)) hoi. hieu va chat thuc ((day danh) or (ha manh)) dai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc sach ky ((nang xa) OR (lang xa)) hoi. hieu va chat thuc ((day danh) OR (ha manh)) dai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuoc sach ky ((nang xa) OR (lang xa)) hoi. hieu va chat thuc ((day danh) or (ha manh)) dai cua tre".
• Adding a wildcard symbol may retrieve word variants: thuoc sach ky ((nang xa) OR (lang xa)) hoi. hieu va chat thuc ((day danh) or (ha manh)) dai cua tre*.