Perhaps you should try some spelling variations:
phan dau » phan tu, hang dau
hanh mai » hanh ma, hanh mau, hanh may
va triet » va trien, ve triet, cua triet
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
thuc va » thuc vat, thuc dan, thuc day
va hanh » van hanh, va thanh, va danh
van am » van nam, van lam, van dam
x hoi » xa hoi, o hoi, x ho
thiet » thieu

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 ky nang x hoi. hieu ((van am) OR (phan dau)) thuc va hanh mai ((va triet) OR (va thiet))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang x hoi. hieu ((van am) or (phan dau)) thuc va hanh mai ((va triet) OR (va thiet))~".
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang x hoi. hieu ((van am) or (phan dau)) thuc va hanh mai ((va triet) OR (va thiet))*.