Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
lam thuc » lam thuoc, am thuc, nam thuc
thuc dan » thuc hanh, hoc dan, thuc vat
danh bat » doanh bat, anh bai
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
nang co » nang doc, nang noi, nang hoc
dinh ba » dinh gia, dinh van, dinh lam
va lam » van lam, va lap

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: tu sach ky ((nang co) OR (nang cao)) hoi. lieu va lam thuc dan ((danh bat) OR (dinh ba)) cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky ((nang co) or (nang cao)) hoi. lieu va lam thuc dan ((danh bat) OR (dinh ba)) cua triet~".
• Adding a wildcard symbol may retrieve word variants: tu sach ky ((nang co) or (nang cao)) hoi. lieu va lam thuc dan ((danh bat) OR (dinh ba)) cua triet*.