Perhaps you should try some spelling variations:
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 » sach y, sach ty, sach kem
hieu va » lieu va, hieu qua
nang xa » nang x, lang xa, nang ma
cua tre » cua te, cuu tre, cua triet
sac ky » cac ky, sai ky

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) OR (sac ky)) nang 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: thu ((sach ky) OR (sac ky)) nang 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: "thu ((sach ky) OR (sac ky)) nang xa hoi. hieu va chat thuc ((day danh) or (ha manh)) dai cua tre".
• Adding a wildcard symbol may retrieve word variants: thu ((sach ky) OR (sac ky)) nang xa hoi. hieu va chat thuc ((day danh) or (ha manh)) dai cua tre*.