Perhaps you should try some spelling variations:
cua triet » cua viet, su triet
thu sach » tu sach, thuat sach, thuoc sach
thanh ly » thanh lay, thanh ky, thanh le
va triet » va thiet, va trien, ve triet
sach ky » sac ky, sach y, sach ty
hieu va » lieu va, hieu qua
xuc va » duc va, tuc va, xac va
luc va » duc va, tuc va, loc 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: thu sach ky nang x ho. hieu va cac ((xuc va) OR (luc va)) thanh ly ((cua triet) OR (va triet))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ky nang x ho. hieu va cac ((xuc va) or (luc va)) thanh ly ((cua triet) OR (va triet))~".
• Adding a wildcard symbol may retrieve word variants: thu sach ky nang x ho. hieu va cac ((xuc va) or (luc va)) thanh ly ((cua triet) OR (va triet))*.