Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
cuu thuc » cuu tac
cua tre » cua te, cuu tre, cua triet
dinh ve » dinh ket, dinh van
va dinh » van dinh, va kinh, va tinh
thuc va » thuc vat, thuc dan, thuc day
hieu va » lieu va, hieu qua
tu cach » tu cac
lang ha » long ha
ky lang » ky nang, ky dang, ky tang
te sach » toc sach
ha hoi » hoa hoi, ha noi, xa hoi
va cuu » va cau, va chu, va huu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu cach) or (te sach)) ky lang ha hoi. hieu va cuu thuc va dinh ve ((cua tre) or (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu cach) OR (te sach)) ky lang ha hoi. hieu va cuu thuc va dinh ve ((cua tre) OR (su triet)).
• Adding a wildcard symbol may retrieve word variants: ((tu cach) or (te sach)) ky lang ha hoi. hieu va cuu thuc va dinh ve ((cua tre) or (su triet))*.