Perhaps you should try some spelling variations:
dinh sai » dinh tai, dinh hai, dinh si
va triet » va thiet, va trien, ve triet
hieu van » hieu va, thien van, lieu va
nam thuc » nam thuoc, am thuc, nam thu
danh sai » dung sai, danh bat, danh dau
te sach » toc sach
sach ky » sac ky, sach y, sach ty
thuc va » thuc vat, thuc dan, thuc day
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
cua te » cua tu

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 lang xa hoi. hieu van nam thuc va ((dinh sai) or (danh sai)) ((va triet) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky lang xa hoi. hieu van nam thuc va ((dinh sai) OR (danh sai)) ((va triet) OR (cua te)).
• Adding a wildcard symbol may retrieve word variants: te sach ky lang xa hoi. hieu van nam thuc va ((dinh sai) or (danh sai)) ((va triet) or (cua te))*.