Perhaps you should try some spelling variations:
chat thuc » thuat thuc, nhan thuc, chat thai
hieu van » hieu va, thien van, lieu va
van chat » cao chat
nang xa » nang x, lang xa, nang ma
sach ky » sac ky, sach ty, sach kem
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cuu tre, cua triet
va dao » ca dao

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 (sach y)) nang xa hoi. hieu van chat thuc ((va dao) or (va hanh)) dai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu ((sach ky) OR (sach y)) nang xa hoi. hieu van chat thuc ((va dao) OR (va hanh)) dai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu ((sach ky) OR (sach y)) nang xa hoi. hieu van chat thuc ((va dao) or (va hanh)) dai cua tre".
• Adding a wildcard symbol may retrieve word variants: thu ((sach ky) OR (sach y)) nang xa hoi. hieu van chat thuc ((va dao) or (va hanh)) dai cua tre*.