Perhaps you should try some spelling variations:
hanh tri » thanh tri, hanh tai, hanh trinh
nhan luc » nang luc
cham luc » cham soc, cham cuu, chat lua
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cuu tre, cua triet
van hoi » van hoa, van hoe, van loi
van hoc » van hoa
ky lang » ky nang, ky dang, ky tang
bac ky » cac ky, ban ky, sac ky
te bac » ten bac, te bao, te ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: te bac ky lang ((van hoi) OR (van hoc)). hieu qua ((cham luc) or (nhan luc)) va hanh tri cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te bac ky lang ((van hoi) OR (van hoc)). hieu qua ((cham luc) OR (nhan luc)) va hanh tri cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te bac ky lang ((van hoi) OR (van hoc)). hieu qua ((cham luc) or (nhan luc)) va hanh tri cua tre".
• Adding a wildcard symbol may retrieve word variants: te bac ky lang ((van hoi) OR (van hoc)). hieu qua ((cham luc) or (nhan luc)) va hanh tri cua tre*.