Perhaps you should try some spelling variations:
thuoc dan » thuoc dang, thuc dan, thuoc ban
dan thanh » dang thanh, danh thanh, ban thanh
thanh ve » hanh ve, thanh va, thanh vien
cao hoi » cau hoi, co hoi, cao hoc
cua tre » cua te, cuu tre, cua triet
tu can » tu ban, tu cac, thu canh
can ky » van ky, dan ky, ban ky
ve nam » va nam, le nam, te nam
he nam » ha nam, nghe nam
ve cua » le cua, de cua, te cua

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 can ky nang ((cao hoi) OR (co hoc)). hieu ((ve nam) OR (he nam)) thuoc dan thanh ve cua tre~.
• Adding a wildcard symbol may retrieve word variants: tu can ky nang ((cao hoi) or (co hoc)). hieu ((ve nam) or (he nam)) thuoc dan thanh ve cua tre*.