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

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