Perhaps you should try some spelling variations:
van doanh » toan doanh, van dong, van thanh
vay doanh » ly doanh, voi doanh, von doanh
toc sach » hoc sach, doc sach, thuoc sach
hieu van » hieu va, thien van, lieu va
sach ky » sac ky, sach y, sach ty
va danh » va dinh, va dan, va hanh
nang ho » nang hoc, nang co, tang ho
tai cua » thai cua, tai cuc, tri cua
van am » van nam, van lam, van dam
ho hoi » hoc hoi, hoa hoi, hoi 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: toc sach ky nang ho hoi. hieu van am thuc ((((van doanh) or (vay doanh))) or (va danh)) tai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ky nang ho hoi. hieu van am thuc ((((van doanh) OR (vay doanh))) OR (va danh)) tai cua te.
• Adding a wildcard symbol may retrieve word variants: toc sach ky nang ho hoi. hieu van am thuc ((((van doanh) or (vay doanh))) or (va danh)) tai cua te*.