Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
lam thuc » lam thuoc, am thuc, nam thuc
sach ky » sac ky, sach y, sach kem
hanh di » hanh vi, hanh de, hang di
va hanh » van hanh, va thanh, va danh
thuc va » thuc vat, thuc dan, thuc day
hieu va » lieu va
lang xa » lang ha, dang xay, lang van
sach ty » sach y, sach tu, sach thu
di cua » dai cua, doi cua, de cua

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 ky) or (sach ty)) lang xa hoi. ((hieu va) OR (hieu qua)) lam thuc va hanh di cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ky) OR (sach ty)) lang xa hoi. ((hieu va) OR (hieu qua)) lam thuc va hanh di cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ky) or (sach ty)) lang xa hoi. ((hieu va) OR (hieu qua)) lam thuc va hanh di cua triet".
• Adding a wildcard symbol may retrieve word variants: tu ((sach ky) or (sach ty)) lang xa hoi. ((hieu va) OR (hieu qua)) lam thuc va hanh di cua triet*.