Perhaps you should try some spelling variations:
cham luc » cham soc, nhan luc, cham cuu
cua tre » cua te, cuu tre, cua triet
ky tang » ky dang, kho tang, ky trong
anh tri » anh thi, anh tai, thanh tri
mai hoi » mai khoi, dai hoi, lai hoi
hieu ve » hieu van
hieu va » lieu va, hieu qua
va anh » van anh, va danh, va hanh
luc va » duc va, tuc va, loc va
vu ban » tu ban, va ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu ban ((ky tang) or (ky nang)) mai hoi. ((hieu ve) OR (hieu va)) cham luc va anh tri cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu ban ((ky tang) OR (ky nang)) mai hoi. ((hieu ve) OR (hieu va)) cham luc va anh tri cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu ban ((ky tang) or (ky nang)) mai hoi. ((hieu ve) OR (hieu va)) cham luc va anh tri cua tre*".