Perhaps you should try some spelling variations:
dan thanh » dang thanh, danh thanh, ban thanh
nam thuc » nam thuoc, am thuc, nam thu
thuc dan » thuc hanh, hoc dan, thuc vat
thanh ve » hanh ve, thanh va, thanh vien
cao hoi » cau hoi, co hoi, cao hoc
hieu ve » hieu va, hieu van
cua tre » cua te, cuu tre, cua triet
tu cai » tu cac, tu can, tu bai
cai ky » cao ky, cac ky, cam ky
ve nam » he nam, va nam, le 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 cai ky nang ((cao hoi) OR (co hoc)). hieu ve nam thuc dan thanh ve cua tre~.
• Adding a wildcard symbol may retrieve word variants: tu cai ky nang ((cao hoi) or (co hoc)). hieu ve nam thuc dan thanh ve cua tre*.