Perhaps you should try some spelling variations:
hieu vien » hieu hien, hieu viec, thieu nien
doanh cua » doanh luan
vien cac » vien bach, vien dai, vien da
va thanh » ban thanh, va tinh, le thanh
su sach » so sach, vu sach
sach vu » sach va, sach tu, sach uu
vu nang » vuc nang, va nang, vu dang
cac tuc » cac toc, cac tu, cac tac
cua tu » cua tuc, cua su, cua cu
x hoi » xa hoi, o hoi, 5 hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach vu nang ((x hoi) OR (x ho)). hieu vien cac tuc ((va thanh) or (gia thanh)) doanh cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach vu nang ((x hoi) OR (x ho)). hieu vien cac tuc ((va thanh) OR (gia thanh)) doanh cua tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach vu nang ((x hoi) OR (x ho)). hieu vien cac tuc ((va thanh) or (gia thanh)) doanh cua tu".
• Adding a wildcard symbol may retrieve word variants: su sach vu nang ((x hoi) OR (x ho)). hieu vien cac tuc ((va thanh) or (gia thanh)) doanh cua tu*.