Perhaps you should try some spelling variations:
cham luc » cham soc, nhan luc, cham cuu
hieu van » hieu va, thien van, lieu va
van cham » van chat, van tham, va cham
ly nang » ky nang, ly hang, ly vang
va hanh » van hanh, va thanh, va danh
hoi cua » hoi chuc
tu sach » thu sach, su sach, te sach
y nang » ky nang, v nang, may nang
luc va » duc va, tuc va, loc va
di cua » dai cua, doi cua, de cua

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

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