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

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 thuc va dinh vai ((cua triet) OR (su 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 thuc va dinh vai ((cua triet) OR (su triet))~".
• Adding a wildcard symbol may retrieve word variants: thu sach ky nang ((ro hai) or (so hai)). lieu va am thuc va dinh vai ((cua triet) OR (su triet))*.