Perhaps you should try some spelling variations:
ky trong » ly trong, ke trong, ky thuong
cham duc » pham duc, cham soc, pham duy
hanh nam » thanh nam, hanh lam, hanh ngay
hieu vu » hieu va, hieu ve, hieu su
vu cham » va cham, vu kham, tu cham
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cuu tre, cua triet

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu bach ((ky trong) or (cay trong)) van hoa. hieu vu cham duc va hanh nam cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu bach ((ky trong) OR (cay trong)) van hoa. hieu vu cham duc va hanh nam cua tre.
• Adding a wildcard symbol may retrieve word variants: vu bach ((ky trong) or (cay trong)) van hoa. hieu vu cham duc va hanh nam cua tre*.