Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
dinh vai » dinh van, dinh vi, dinh va
thu sach » tu sach, thuat sach, thuoc sach
thuc va » thuc vat, thuc dan, thuc day
sach ky » sac ky, sach y, sach ty
va dinh » van dinh, va kinh, va tinh
vai cua » dai cua, hai cua, lai cua
so hai » son hai, su hai, so ha
va cam » va cham, va cac, va cao
ro hai » co hai, o hai, do hai
va am » va lam

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 ((ro hai) OR (so hai)). lieu ((va am) OR (va cam)) thuc va dinh vai cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ky nang ((ro hai) or (so hai)). lieu ((va am) OR (va cam)) thuc va dinh vai cua triet~".
• Adding a wildcard symbol may retrieve word variants: thu sach ky nang ((ro hai) or (so hai)). lieu ((va am) OR (va cam)) thuc va dinh vai cua triet*.