Perhaps you should try some spelling variations:
nam thuoc » nam thuc, nam thu, nha thuoc
thanh dan » thanh san, thanh van, thanh dat
va thanh » gia thanh, ban thanh, va tinh
thuoc va » thuc va, thuoc ma, thuong va
hieu ve » hieu va, hieu van
dan cua » dan ca, ban cua, dai cua
cua tre » cua te, cuu tre, cua triet
ky sang » ky dang, ky tang, duy sang
ve nam » he nam, va nam, le nam
ma hoi » mai hoi, ma hoa, me hoi
tu cai » tu cac, tu can, tu bai

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

• If you are trying to use Boolean operators, they must be ALL CAPS: tu cai ((ky sang) OR (ky nang)) ((ma hoi) OR (xa hoi)). hieu ve nam thuoc va thanh dan cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu cai ((ky sang) OR (ky nang)) ((ma hoi) or (xa hoi)). hieu ve nam thuoc va thanh dan cua tre~".
• Adding a wildcard symbol may retrieve word variants: tu cai ((ky sang) OR (ky nang)) ((ma hoi) or (xa hoi)). hieu ve nam thuoc va thanh dan cua tre*.