Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
thuc day » thuc vat
danh vai » danh sai, danh va, doanh van
thuc dan » thuc hanh, hoc dan, thuc vat
vai cua » dai cua, hai cua, lai cua
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
thuc va » thuc vat
hieu va » lieu va, hieu qua
nang co » nang cao, nang doc, nang noi
co hoi » co hoc, co loi
va am » va lam, va cam

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 hoi. hieu va am ((thuc va) OR (((thuc day) OR (thuc dan)))) danh vai cua viet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang co hoi. hieu va am ((thuc va) or (((thuc day) OR (thuc dan)))) danh vai cua viet~".
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang co hoi. hieu va am ((thuc va) or (((thuc day) OR (thuc dan)))) danh vai cua viet*.