Perhaps you should try some spelling variations:
cua triet » cua viet, su triet
va triet » va thiet, va trien, ve triet
danh vai » danh sai, danh va, doanh van
thuc va » thuc vat, thuc dan, thuc day
va danh » va dinh, va dan, va hanh
tu sach » thu sach, su sach, te sach
y nang » ky nang, ly nang, may nang
co hoi » co hoc, co loi
v nang » va nang, vu nang, van nang
qua am » quan am, qua ap, cua am

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