Perhaps you should try some spelling variations:
ban doanh » van doanh, san doanh, ban danh
thu sach » tu sach, thuat sach, thuoc sach
doanh vi » doanh va, doan vi, doanh vien
sach ky » sac ky, sach y, sach ty
cuc ban » cua ban, cac ban, cuu ban
va tham » van tham, va cham, va thanh
ve chat » va chat, van chat
ve cham » va cham, vu cham, ve chim
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
cua tre » cua te, cuu tre, cua triet
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach ky lang xa hoi. hieu ((((ve cham) or (ve chat))) or (va tham)) cuc ban doanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky lang xa hoi. hieu ((((ve cham) OR (ve chat))) OR (va tham)) cuc ban doanh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: thu sach ky lang xa hoi. hieu ((((ve cham) or (ve chat))) or (va tham)) cuc ban doanh vi cua tre*.