Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
lam thuc » lam thuoc, am thuc, nam thuc
danh sai » dung sai, danh bat, danh dau
nang co » nang cao, nang doc, nang noi
sach ky » sach y, sach ty, sach kem
hieu va » lieu va, hieu qua
thuc va » thuc vat, thuc dan, thuc day
va danh » va dinh, va dan, va hanh
sac ky » sai ky
co hoi » co hoc, co loi
va lam » van lam, va lap
sai su » lai su, sat su, tai su

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

• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach ky) OR (((sac ky) OR (cac ky)))) nang co hoi. hieu va lam thuc va danh sai su triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach ky) or (((sac ky) OR (cac ky)))) nang co hoi. hieu va lam thuc va danh sai su triet~".
• Adding a wildcard symbol may retrieve word variants: te ((sach ky) or (((sac ky) OR (cac ky)))) nang co hoi. hieu va lam thuc va danh sai su triet*.