Perhaps you should try some spelling variations:
cua triet » cua viet, va triet
thu sach » tu sach, thuat sach, thuoc sach
tam thuc » tham thuc, am thuc, nam thuc
su triet » su viet, su tien, ve triet
hieu va » lieu va
thuc va » thuc vat, thuc dan, thuc day
nang ma » tang ma, sang ma, nang cao
y nang » ky nang, ly nang, v nang
va dan » ca dan, va dao, va dau
dan vi » doan vi, don vi, dan 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 y nang ma hoa. ((hieu va) OR (hieu qua)) tam thuc va dan vi ((cua triet) OR (su triet))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach y nang ma hoa. ((hieu va) or (hieu qua)) tam thuc va dan vi ((cua triet) OR (su triet))~".
• Adding a wildcard symbol may retrieve word variants: thu sach y nang ma hoa. ((hieu va) or (hieu qua)) tam thuc va dan vi ((cua triet) OR (su triet))*.