Perhaps you should try some spelling variations:
cua viet » hoa viet, cua vat, cua dieu
danh tai » doanh tai, dinh tai, hanh tai
thuc va » thuc vat, thuc dan, thuc day
va danh » va dinh, va dan, va hanh
ca viet » va viet, co viet, hoa viet
hieu va » lieu va, hieu qua
nang co » nang cao, nang doc, nang noi
sac ky » sai ky
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: thu ((sac ky) OR (cac ky)) nang co hoi. hieu va am thuc va danh tai ((cua viet) OR (ca viet))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu ((sac ky) or (cac ky)) nang co hoi. hieu va am thuc va danh tai ((cua viet) OR (ca viet))~".
• Adding a wildcard symbol may retrieve word variants: thu ((sac ky) or (cac ky)) nang co hoi. hieu va am thuc va danh tai ((cua viet) OR (ca viet))*.