Perhaps you should try some spelling variations:
va triet » va thiet, va trien, ve triet
su sach » so sach, vu sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
nang xa » nang x, lang xa, nang ma
qua cau » quan cau, qua cac, qua ca
dinh ve » dinh ket, dinh van
luc va » duc va, tuc va
loc va » hoc va
ve va » ve van, te va, ke va

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: "su sach ty nang xa hoi. hieu qua cau ((luc va) OR (loc va)) dinh ve va triet~".
• Adding a wildcard symbol may retrieve word variants: su sach ty nang xa hoi. hieu qua cau ((luc va) OR (loc va)) dinh ve va triet*.