Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
dinh bat » danh bat, dinh ba, dinh dat
nang doc » nang luc
bat cua » ban cua, mat cua, bai cua
thuc va » thuc dan, thuc day
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
nang co » nang cao, nang noi, nang hoc
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 doc)) hoi. lieu va lam ((thuc va) OR (thuc vat)) dinh bat cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky ((nang co) or (nang doc)) hoi. lieu va lam ((thuc va) OR (thuc vat)) dinh bat cua triet~".
• Adding a wildcard symbol may retrieve word variants: tu sach ky ((nang co) or (nang doc)) hoi. lieu va lam ((thuc va) OR (thuc vat)) dinh bat cua triet*.