Perhaps you should try some spelling variations:
chat thuc » thuat thuc, nhan thuc, chat thai
danh sai » dung sai, danh bat, danh dau
sai cua » dai cua, hai cua, lai cua
va danh » va dinh, va dan, va hanh
thuc va » thuc vat, thuc dan, thuc day
cua tre » cua te, cuu tre, cua triet
sach ky » sach y, sach ty, sach kem
hieu va » lieu va
nang xa » nang x, lang xa, nang ma
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) OR (hieu qua)) chat thuc va danh sai 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) OR (hieu qua)) chat thuc va danh sai 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) OR (hieu qua)) chat thuc va danh sai cua tre".
• Adding a wildcard symbol may retrieve word variants: thu ((sach ky) or (sac ky)) nang xa hoi. ((hieu va) OR (hieu qua)) chat thuc va danh sai cua tre*.