Perhaps you should try some spelling variations:
sach tru » sach truc, sach thu, sach tu
tru nang » tra nang, tri nang, truc nano
cham luc » cham soc, nhan luc, cham cuu
van hanh » van thanh, ban hanh, van anh
so sach » so sanh, bo sach, co sach
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
luc van » luoc van, luu van, duc van
vai cua » dai cua, hai cua, lai cua
co hoi » co hoc, co loi
vi cua » di cua
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach tru nang ((x hoi) or (co hoi)). hieu ve cham luc van hanh ((vi cua) or (vai cua)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach tru nang ((x hoi) OR (co hoi)). hieu ve cham luc van hanh ((vi cua) OR (vai cua)) triet.
• Adding a wildcard symbol may retrieve word variants: so sach tru nang ((x hoi) or (co hoi)). hieu ve cham luc van hanh ((vi cua) or (vai cua)) triet*.