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
tu sach » thu sach, su sach, te sach
ty nang » ty xang, ty hang, ly nang
hieu va » lieu va, hieu qua
thuc va » thuc vat, thuc dan, thuc day
van cua » vang cua, ban cua, dan cua
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 ((ty nang) OR (ky nang)) co hoi. hieu va am thuc va doanh van cua triet~.
• Adding a wildcard symbol may retrieve word variants: tu sach ((ty nang) or (ky nang)) co hoi. hieu va am thuc va doanh van cua triet*.