Perhaps you should try some spelling variations:
thien van » thi van
su triet » su viet, su tien, ve triet
hieu van » hieu va, lieu va, hieu ve
thuc va » thuc vat, thuc dan, thuc day
cua tre » cua te, cuu tre, cua triet
dinh va » dinh van, dinh ve, tinh va
va dinh » van dinh, va kinh, va tinh
te sach » toc sach
sach ky » sac ky, sach y, sach ty
dang ha » dong ha, dung ha, lang ha
ky dang » ky nang, ky danh

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ky dang ha noi. ((hieu van) OR (thien van)) am thuc va dinh va ((cua tre) or (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky dang ha noi. ((hieu van) OR (thien van)) am thuc va dinh va ((cua tre) OR (su triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky dang ha noi. ((hieu van) OR (thien van)) am thuc va dinh va ((cua tre) or (su triet))".
• Adding a wildcard symbol may retrieve word variants: te sach ky dang ha noi. ((hieu van) OR (thien van)) am thuc va dinh va ((cua tre) or (su triet))*.