Perhaps you should try some spelling variations:
cham luc » cham soc, nhan luc, cham cuu
thanh vi » hanh vi, thanh ve, nhanh vi
thanh va » thanh van, hanh va, thanh ha
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
cua tre » cua te, cuu tre, cua triet
luc va » duc va, tuc va, loc va
5 hoi » o hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu cac ky nang ((5 hoi) or (x ho)). hieu ve cham luc va ((thanh vi) OR (thanh va)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu cac ky nang ((5 hoi) OR (x ho)). hieu ve cham luc va ((thanh vi) OR (thanh va)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu cac ky nang ((5 hoi) or (x ho)). hieu ve cham luc va ((thanh vi) OR (thanh va)) cua tre".
• Adding a wildcard symbol may retrieve word variants: tu cac ky nang ((5 hoi) or (x ho)). hieu ve cham luc va ((thanh vi) OR (thanh va)) cua tre*.