Perhaps you should try some spelling variations:
doanh van » doan van, doanh va, doanh ban
va doanh » van doanh, vay doanh, va danh
hieu van » hieu va, thien van, lieu va
van cua » vang cua, ban cua, dan cua
lam duc » lam duoc, pham duc, nam duoc
van lam » van nam
mai hoi » mai khoi, dai hoi, lai hoi
sach ky » sac ky, sach ty, sach kem
ma hoi » xa hoi, ma hoa, me hoi
cua te » cua tu

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 ky) OR (sach y)) nang ((ma hoi) OR (mai hoi)). hieu van lam duc va doanh van cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ky) OR (sach y)) nang ((ma hoi) or (mai hoi)). hieu van lam duc va doanh van cua te~".
• Adding a wildcard symbol may retrieve word variants: tu ((sach ky) OR (sach y)) nang ((ma hoi) or (mai hoi)). hieu van lam duc va doanh van cua te*.