Perhaps you should try some spelling variations:
lam thuoc » nam thuoc, am thuc, cay thuoc
va thanh » ban thanh, va tinh, le thanh
hieu van » hieu va, thien van, lieu va
van lam » van nam
mai hoi » mai khoi, dai hoi, mai doi
lai hoi » dai hoi, lai hoa, lai roi
ca cua » co cua
so sac » so sach, so dac
sac ky » cac ky, sai ky
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sac ky nang ((mai hoi) OR (lai hoi)). hieu van lam thuoc ((va thanh) or (gia thanh)) ca cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sac ky nang ((mai hoi) OR (lai hoi)). hieu van lam thuoc ((va thanh) OR (gia thanh)) ca cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sac ky nang ((mai hoi) OR (lai hoi)). hieu van lam thuoc ((va thanh) or (gia thanh)) ca cua te".
• Adding a wildcard symbol may retrieve word variants: so sac ky nang ((mai hoi) OR (lai hoi)). hieu van lam thuoc ((va thanh) or (gia thanh)) ca cua te*.