Perhaps you should try some spelling variations:
cam truc » cau truc, nam truc, lam truoc
truc ban » thuc ban, truc dan, truc van
ban hang » ngan hang
su triet » su tien, ve triet
so sach » so sanh, bo sach, co sach
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
hang vi » hang va, hanh vi, hang di
su viet » so viet
sach v » sach va, sach y, sach 2
v nang » va nang, vu nang, van nang
va cam » va cham, va cac, va cao

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach v nang xa hoi. hieu va cam truc ban hang vi ((su triet) OR (su viet))~".
• Adding a wildcard symbol may retrieve word variants: so sach v nang xa hoi. hieu va cam truc ban hang vi ((su triet) OR (su viet))*.