Perhaps you should try some spelling variations:
van doanh » toan doanh, van dong, van thanh
hoc sach » hoc sinh, hoc cac, hoc anh
lam duoc » nam duoc, luat duoc, lam thuoc
duoc van » duoc va, duc van, duoc ban
hieu van » hieu va, thien van, lieu va
ky sang » ky nang, ky dang, duy sang
tai cua » thai cua, tai cuc, tri cua
ky tang » ky nang, ky dang, kho tang
van lam » van nam
cua te » cua tu
ma hoi » mai hoi, ma hoa, me hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc sach ((ky sang) or (ky tang)) ((ma hoi) or (xa hoi)). hieu van lam duoc van doanh tai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sach ((ky sang) OR (ky tang)) ((ma hoi) OR (xa hoi)). hieu van lam duoc van doanh tai cua te.
• Adding a wildcard symbol may retrieve word variants: hoc sach ((ky sang) or (ky tang)) ((ma hoi) or (xa hoi)). hieu van lam duoc van doanh tai cua te*.