Perhaps you should try some spelling variations:
cham luc » cham soc, nhan luc, cham cuu
nang xa » nang x, lang xa, nang ma
su sach » so sach, vu sach
hieu vu » hieu va, hieu ve, hieu su
vu cham » va cham, vu kham, tu cham
va hanh » van hanh, va thanh, va danh
tu sach » thu sach, te sach, tu cach
y nang » ky nang, ly nang, v nang
luc va » duc va, tuc va, loc va
vai va » mai va, hai va, lai va
dai va » mai va

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) y nang xa hoi. hieu vu cham luc va hanh ((vai va) OR (dai va)) triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (su sach)) y nang xa hoi. hieu vu cham luc va hanh ((vai va) OR (dai va)) triet~".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (su sach)) y nang xa hoi. hieu vu cham luc va hanh ((vai va) OR (dai va)) triet*.