Perhaps you should try some spelling variations:
va triet » va trien, ve triet, cua triet
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
thuc va » thuc vat, thuc dan, thuc day
va hanh » van hanh, va thanh, va danh
hanh va » hang va, hanh vi
ve nam » he nam, va nam, te nam
le nam » ly nam, he nam, le na
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: su sach ky nang xa hoi. hieu ((ve nam) OR (le nam)) thuc va hanh va ((va triet) OR (va thiet))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky nang xa hoi. hieu ((ve nam) OR (le nam)) thuc va hanh va ((va triet) or (va thiet))~".
• Adding a wildcard symbol may retrieve word variants: su sach ky nang xa hoi. hieu ((ve nam) OR (le nam)) thuc va hanh va ((va triet) or (va thiet))*.