Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
nang doc » nang luc
cham xuc » cam xuc, chat xuc, cham soc
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
hieu va » lieu va, hieu qua
va cham » va chat, va tham
va vanh » va danh, va hanh, va anh
nang o » nang co, nang ho, nang ro

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 ky ((nang o) OR (nang doc)) hoi. hieu va cham xuc ((va vanh) OR (va van)) dai cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky ((nang o) or (nang doc)) hoi. hieu va cham xuc ((va vanh) OR (va van)) dai cua triet~".
• Adding a wildcard symbol may retrieve word variants: tu sach ky ((nang o) or (nang doc)) hoi. hieu va cham xuc ((va vanh) OR (va van)) dai cua triet*.