Perhaps you should try some spelling variations:
cham luc » cham soc, nhan luc, cham cuu
cua tre » cua te, cuu tre, cua triet
anh thi » anh tho, dinh thi, dang thi
anh tri » anh tai, thanh tri, anh trinh
ve cham » va cham, ve chat, vu cham
hieu ve » hieu va, hieu van
mai hoi » mai khoi, dai hoi, lai hoi
ky tang » ky dang, kho tang, ky trong
luc va » duc va, tuc va, loc va
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 va ((anh tri) OR (anh thi)) 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 va ((anh tri) OR (anh thi)) 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 va ((anh tri) OR (anh thi)) cua tre*".