Perhaps you should try some spelling variations:
nhan luc » nang luc
cham luc » cham soc, cham cuu, chat lua
cua tre » cua te, cuu tre, cua triet
anh tri » anh thi, anh tai, thanh tri
hieu ve » hieu va, hieu van
mai hoi » mai khoi, dai hoi, lai hoi
ky tang » ky dang, kho tang, ky trong
va anh » van anh, va danh, va hanh
tu ban » thu ban, 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: tu ban ((ky tang) or (ky nang)) mai hoi. hieu ve ((cham luc) OR (nhan luc)) va anh tri cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ban ((ky tang) OR (ky nang)) mai hoi. hieu ve ((cham luc) OR (nhan luc)) va anh tri cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ban ((ky tang) or (ky nang)) mai hoi. hieu ve ((cham luc) OR (nhan luc)) va anh tri cua tre*".