Perhaps you should try some spelling variations:
cua triet » cua viet, su triet
danh vai » danh sai, danh va, doanh van
va triet » va thiet, va trien, ve triet
tu sach » thu sach, su sach, te sach
thuc va » thuc vat, thuc dan, thuc day
va danh » va dinh, va dan, va hanh
y nang » ky nang, ly nang, v nang
nang o » nang co, nang ho, nang ro
qua am » quan am, qua ap, cua am
o hai » co hai, so hai, o lai

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 o hai. hieu qua am thuc va danh vai ((cua triet) OR (va triet))~.
• Adding a wildcard symbol may retrieve word variants: tu sach y nang o hai. hieu qua am thuc va danh vai ((cua triet) or (va triet))*.