Perhaps you should try some spelling variations:
cua triet » cua viet, va triet
doanh van » doan van, doanh va, doanh ban
thu sach » tu sach, thuat sach, thuoc sach
va doanh » van doanh, vay doanh, va danh
su triet » su viet, su tien, ve triet
hieu va » lieu va, hieu qua
thuc va » thuc vat, thuc dan, thuc day
y nang » ky nang, ly nang, v nang
co hoi » 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 sach y nang ((co hoi) OR (co hoc)). hieu va am thuc va doanh van ((cua triet) OR (su triet))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach y nang ((co hoi) or (co hoc)). hieu va am thuc va doanh van ((cua triet) OR (su triet))~".
• Adding a wildcard symbol may retrieve word variants: thu sach y nang ((co hoi) or (co hoc)). hieu va am thuc va doanh van ((cua triet) OR (su triet))*.