Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
truc va » thuc va, thuc vat, trung va
va hanh » van hanh, va thanh, va danh
co hai » co dai, co hoi, so hai
va cam » va cham, va cao, va cai
vi cua » vai cua, di cua
o hai » so hai, o lai, _ hai

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 ky nang ((o hai) or (co hai)). lieu ((va cam) or (va cac)) truc va hanh vi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang ((o hai) OR (co hai)). lieu ((va cam) OR (va cac)) truc va hanh vi cua triet.
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang ((o hai) or (co hai)). lieu ((va cam) or (va cac)) truc va hanh vi cua triet*.