Perhaps you should try some spelling variations:
van doanh » toan doanh, van dong, van thanh
su sach » so sach, vu sach
mai hoi » mai khoi, dai hoi, lai hoi
hieu ve » hieu va, hieu van
tai cua » thai cua, tai cuc, tri cua
y nang » ky nang, ly nang, v nang
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.

• Performing a fuzzy search may retrieve terms with similar spellings: su sach y nang ((ma hoi) or (mai hoi)). hieu ve ((pham duc) or (giao duc)) van doanh tai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y nang ((ma hoi) OR (mai hoi)). hieu ve ((pham duc) OR (giao duc)) van doanh tai cua te.
• Adding a wildcard symbol may retrieve word variants: su sach y nang ((ma hoi) or (mai hoi)). hieu ve ((pham duc) or (giao duc)) van doanh tai cua te*.