Perhaps you should try some spelling variations:
lam thuoc » nam thuoc, am thuc, cay thuoc
thuoc va » thuc va, thuoc ma, thuong va
tinh hai » tinh thai, tinh chat, trinh han
tang ma » mang may, tang van
hieu va » lieu va, hieu qua
va tinh » may tinh
hai cua » thai cua, dai cua, hoi cua
cua tre » cua te, cuu tre, cua triet
sai ky » sac ky
ma hoi » mai hoi, xa hoi, ma hoa
va lam » van lam, va lap

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

• Performing a fuzzy search may retrieve terms with similar spellings: su ((cac ky) or (sai ky)) tang ma hoi. hieu va lam thuoc va tinh hai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((cac ky) OR (sai ky)) tang ma hoi. hieu va lam thuoc va tinh hai cua tre.
• Adding a wildcard symbol may retrieve word variants: su ((cac ky) or (sai ky)) tang ma hoi. hieu va lam thuoc va tinh hai cua tre*.