Perhaps you should try some spelling variations:
ban doanh » van doanh, san doanh, ban danh
cham duc » pham duc, cham soc, pham duy
doanh de » doanh dao, doanh ket, doanh va
sach thu » sach thue, sach thieu, sach tham
cua tre » cua te, cuu tre, cua triet
duc ban » duc tan, duc van, dua ban
vu cham » va cham, vu kham, tu cham
sach tu » cach tu, sach ty, sach uu
hieu vu » hieu va, hieu ve, hieu su
cua tu » cua tuc, cua su, cua cu
x hoi » xa hoi, o hoi, x ho

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: tu ((sach tu) OR (sach thu)) nang x hoi. hieu vu cham duc ban doanh de ((cua tre) OR (cua tu))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach tu) OR (sach thu)) nang x hoi. hieu vu cham duc ban doanh de ((cua tre) or (cua tu))~".
• Adding a wildcard symbol may retrieve word variants: tu ((sach tu) OR (sach thu)) nang x hoi. hieu vu cham duc ban doanh de ((cua tre) or (cua tu))*.