Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
ve triet » va trien, su triet
hieu va » lieu va, hieu qua
sach ky » sac ky, sach y, sach ty
xuc va » duc va, tuc va, xac va
luc va » duc va, tuc va, loc va
va cau » van cau, va cac, va dau
o hoi » co hoi, o hoc, o hai
x hoi » xa hoi, x ho, 5 hoi
vi ve » va ve, gi ve, ve ve

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: thu sach ky nang ((x hoi) OR (o hoi)). hieu va cau ((xuc va) OR (luc va)) hanh vi ve triet~.
• Adding a wildcard symbol may retrieve word variants: thu sach ky nang ((x hoi) or (o hoi)). hieu va cau ((xuc va) or (luc va)) hanh vi ve triet*.