Perhaps you should try some spelling variations:
lam thuoc » nam thuoc, am thuc, cay thuoc
thanh hai » thanh phan, thanh hoa, thanh san
lam duoc » nam duoc, luat duoc, tao duoc
va thanh » gia thanh, ban thanh, va tinh
hai cua » thai cua, dai cua, hoi cua
cua tre » cua te, cuu tre, cua triet
sach ky » sach y, sach ty, sach kem
sac ky » cac ky, sai ky
x hoi » xa hoi, o hoi, x ho

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 ky) or (sac ky)) nang x hoi. lieu va ((lam duoc) OR (lam thuoc)) va thanh hai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ky) OR (sac ky)) nang x hoi. lieu va ((lam duoc) OR (lam thuoc)) va thanh hai cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ky) or (sac ky)) nang x hoi. lieu va ((lam duoc) OR (lam thuoc)) va thanh hai cua tre*".