Perhaps you should try some spelling variations:
ban doanh » van doanh, san doanh, ban danh
cua viet » ca viet, hoa viet, cua vat
lang van » dang van, tang van, hoang van
doanh vi » doanh va, doan vi, doanh vien
chat cua » nhat cua, chat va, chat huu
sach ky » sac ky, sach y, sach ty
cua tre » cua te, cuu tre, cua triet
tu sach » thu sach, su sach, te sach
cam cuu » cham cuu, cap cuu
hieu ve » hieu va, hieu van
van hoe » van hoa, van hoc, van hieu
ky lang » ky nang, ky dang, ky tang

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 ky lang van hoe. hieu ve ((cam cuu) or (chat cua)) ban doanh vi ((cua tre) or (cua viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky lang van hoe. hieu ve ((cam cuu) OR (chat cua)) ban doanh vi ((cua tre) OR (cua viet)).
• Adding a wildcard symbol may retrieve word variants: tu sach ky lang van hoe. hieu ve ((cam cuu) or (chat cua)) ban doanh vi ((cua tre) or (cua viet))*.