Perhaps you should try some spelling variations:
thuoc day » thuc day, thuoc dac, thuoc dang
day thanh » dao thanh, dat thanh, da thanh
nam thuoc » nam thuc, nam thu, nha thuoc
thanh le » thinh le, thanh ve, thanh de
tao khoi » tao hoi, thao khoa, lao khoa
hieu ve » hieu va, hieu van
cua tre » cua te, cuu tre, cua triet
cao hoc » co hoc, cho hoc, chat hoc
cai ky » cac ky, cam ky, sai ky
ve nam » he nam, va nam, le nam
le cua » ly 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) OR (cao ky)) nang ((tao khoi) OR (cao hoc)). hieu ve nam thuoc day thanh le cua tre~.
• Adding a wildcard symbol may retrieve word variants: tu ((cai ky) or (cao ky)) nang ((tao khoi) or (cao hoc)). hieu ve nam thuoc day thanh le cua tre*.