Perhaps you should try some spelling variations:
van doanh » toan doanh, van dong, van thanh
doanh vi » doanh va, doan vi, doanh vien
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
lam xuc » cam xuc, lam duoc
xuc van » duc van, luc van, vuc van
cua tre » cua te, cuu tre, cua triet
co hoi » co hoc, co loi
va lam » van lam, va lap
cua su » qua su
o hoi » o hoc, o hai, o hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ty xang ((o hoi) or (co hoi)). lieu va lam xuc van doanh vi ((cua tre) or (cua su))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty xang ((o hoi) OR (co hoi)). lieu va lam xuc van doanh vi ((cua tre) OR (cua su)).
• Adding a wildcard symbol may retrieve word variants: tu sach ty xang ((o hoi) or (co hoi)). lieu va lam xuc van doanh vi ((cua tre) or (cua su))*.