Perhaps you should try some spelling variations:
van doanh » toan doanh, van dong, van thanh
cham tuc » nham thuc, pham thuc, tham thuc
va doanh » vay doanh, va danh, hoa doanh
nang xa » lang xa, nang ma, mang xa
hieu va » lieu va, hieu qua
va cham » va chat, va tham
tai cua » thai cua, tai cuc, tri cua
cua tre » cua te, cuu tre, cua triet
te sac » te sach, te cac, te san
sac ky » cac ky, sai ky

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: te sac ky ((nang xa) OR (nang x)) hoi. hieu va cham tuc ((va doanh) OR (van doanh)) tai cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sac ky ((nang xa) OR (nang x)) hoi. hieu va cham tuc ((va doanh) or (van doanh)) tai cua tre~".
• Adding a wildcard symbol may retrieve word variants: te sac ky ((nang xa) OR (nang x)) hoi. hieu va cham tuc ((va doanh) or (van doanh)) tai cua tre*.