Perhaps you should try some spelling variations:
sach kem » hanh kem
nam thuc » nam thuoc, am thuc, nam thu
thuc van » thuc vat, thuc dan, thuc va
van hanh » van thanh, ban hanh, van anh
hanh tue » hanh tu, hanh tuyen, hanh theo
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
tue cua » te cua
cua tre » cua te, cuu tre, cua triet
sai ky » sac ky
va nam » van nam, ha nam, va nay

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((sach kem) or (sai ky)) nang xa hoi. hieu va nam thuc van hanh tue cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach kem) OR (sai ky)) nang xa hoi. hieu va nam thuc van hanh tue cua tre.
• Adding a wildcard symbol may retrieve word variants: tu ((sach kem) or (sai ky)) nang xa hoi. hieu va nam thuc van hanh tue cua tre*.