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