Perhaps you should try some spelling variations:
su triet » su tien, ve triet
ban hang » ngan hang
su sach » so sach, vu sach
hang vi » hang va, hanh vi, hang di
va cham » va chat, va tham
nang xa » nang x, lang xa, nang ma
su viet » so viet
sach v » sach va, sach y, sach 2
tu ban » thu ban, te ban
va cam » va cac, va cao, va cai
v nang » va nang, vu nang, van nang

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 v nang xa hoi. hieu ((va cam) OR (va cham)) tu ban hang vi ((su triet) OR (su viet))~.
• Adding a wildcard symbol may retrieve word variants: su sach v nang xa hoi. hieu ((va cam) or (va cham)) tu ban hang vi ((su triet) or (su viet))*.