Perhaps you should try some spelling variations:
dinh tai » dinh toai, dinh tri, dinh thi
nam thuc » nam thuoc, am thuc, nam thu
tu sach » thu sach, su sach, tu cach
tai cuu » tai cuc, tai buu, tai cua
va dinh » van dinh, va kinh, va tinh
thuc va » thuc vat, thuc dan, thuc day
hieu le » hieu ve, hieu he, hieu ly
mai hoi » mai khoi, dai hoi, lai hoi
te sach » toc sach
cuu tre » cua tre, cau tren, cau treo
le nam » ly nam, he nam, le na
ma hoi » xa hoi, ma hoa, me hoi
y nang » ky nang, ly nang, v nang

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sach) or (te sach)) y nang ((ma hoi) OR (mai hoi)). hieu le nam thuc va dinh tai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (te sach)) y nang ((ma hoi) OR (mai hoi)). hieu le nam thuc va dinh tai cuu tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (te sach)) y nang ((ma hoi) OR (mai hoi)). hieu le nam thuc va dinh tai cuu tre*".