Perhaps you should try some spelling variations:
va thanh » gia thanh, ban thanh, va tinh
su sach » so sach, vu sach
nang xa » nang x, lang xa, nang ma
qua cau » quan cau, qua cac, qua ca
cau loc » hau loc, cau hoc, cau luc
y nang » ky nang, ly nang, v nang
loc va » hoc va, luc va
vi va » vi van, vai va, ve va
bi va » bo va
vu va » vu van, tu va, su va

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 y nang xa hoi. hieu qua cau loc va thanh ((((vi va) OR (bi va))) OR (vu va)) triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y nang xa hoi. hieu qua cau loc va thanh ((((vi va) OR (bi va))) or (vu va)) triet~".
• Adding a wildcard symbol may retrieve word variants: su sach y nang xa hoi. hieu qua cau loc va thanh ((((vi va) OR (bi va))) or (vu va)) triet*.