Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
danh vai » danh sai, danh va, doanh van
nang noi » nang doc
vai cua » dai cua, hai cua, lai cua
thuc va » thuc dan, thuc day
te sach » toc sach
sach ky » sac ky, sach y, sach ty
hieu va » lieu va, hieu qua
nang co » nang cao, nang doc, nang hoc
va lap » va dap

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 ((nang co) OR (nang noi)) loi. hieu va lap ((thuc va) OR (thuc vat)) danh vai cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky ((nang co) OR (nang noi)) loi. hieu va lap ((thuc va) or (thuc vat)) danh vai cua triet~".
• Adding a wildcard symbol may retrieve word variants: te sach ky ((nang co) OR (nang noi)) loi. hieu va lap ((thuc va) or (thuc vat)) danh vai cua triet*.