Perhaps you should try some spelling variations:
doanh van » doan van, doanh va, doanh ban
cua triet » cua viet, su triet, va triet
va doanh » van doanh, vay doanh, va danh
nang co » nang cao, nang doc, nang noi
hieu va » lieu va
thuc va » thuc vat, thuc dan, thuc day
van cua » vang cua, ban cua, dan cua
sac ky » sai ky
co hoi » co hoc, co loi

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 ((sac ky) OR (cac ky)) nang co hoi. ((hieu va) OR (hieu qua)) am thuc va doanh van cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sac ky) OR (cac ky)) nang co hoi. ((hieu va) or (hieu qua)) am thuc va doanh van cua triet~".
• Adding a wildcard symbol may retrieve word variants: tu ((sac ky) OR (cac ky)) nang co hoi. ((hieu va) or (hieu qua)) am thuc va doanh van cua triet*.