Perhaps you should try some spelling variations:
chat thuc » thuat thuc, nhan thuc, chat thai
thuc day » thuc dan, thuc vat
hieu va » lieu va, hieu qua
vai cua » dai cua, hai cua, lai cua
don vai » don vi, don va, den vai
day don » day dong, day con, day dan
va chat » van chat, va phat, cao chat
cua tre » cua te, cuu tre, cua triet
nang xa » nang x, lang xa, nang ma
tuc dan » thuc dan, tung dan, tuc tang
tu dan » tu ban, cu dan, tu can

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

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