Perhaps you should try some spelling variations:
thien van » thi van
cay thuoc » cua thuoc, nam thuoc, va thuoc
nang cau » nang cao, hang cau, bang cau
nang dau » hang dau, xang dau, nang du
thuoc ma » hoc ma, duoc ma
ma thanh » mai thanh, va thanh, ha thanh
thanh ca » thanh cha, thanh cac, thanh ha
so sach » so sanh, bo sach, co sach
van cay » van cau, van bay, van ca
cua tre » cua te, cuu tre, cua triet
ca cua » co cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach y ((nang cau) OR (nang dau)) hoi. thien van cay thuoc ma thanh ca cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach y ((nang cau) OR (nang dau)) hoi. thien van cay thuoc ma thanh ca cua tre".
• Adding a wildcard symbol may retrieve word variants: so sach y ((nang cau) OR (nang dau)) hoi. thien van cay thuoc ma thanh ca cua tre*.