Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
hieu va » lieu va, hieu qua
thuc va » thuc vat, thuc dan, thuc day
va dinh » van dinh, va kinh, va tinh
ro hai » co hai, o hai, do hai
so hai » son hai, su hai, so ha
van su » dan su
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: tu sach ky nang ((ro hai) OR (so hai)). hieu va am thuc va dinh van su triet~.
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang ((ro hai) or (so hai)). hieu va am thuc va dinh van su triet*.