Perhaps you should try some spelling variations:
cac thuc » cach thuc, cac thu, can thuc
dinh cao » tinh cao, dinh cac, dinh dao
su sach » so sach, vu 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
cao cua » ca cua, co cua, cau cua
cua tre » cua te, cuu tre, cua triet

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ky nang ((((me hoi) or (le hoi))) or (ma hoa)). hieu va cac thuc va dinh cao cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang ((((me hoi) OR (le hoi))) OR (ma hoa)). hieu va cac thuc va dinh cao cua tre.
• Adding a wildcard symbol may retrieve word variants: su sach ky nang ((((me hoi) or (le hoi))) or (ma hoa)). hieu va cac thuc va dinh cao cua tre*.