Perhaps you should try some spelling variations:
ban hang » ngan hang
cham duc » pham duc, cham soc, pham duy
te sach » toc sach
hieu va » lieu va, hieu qua
hang de » hoang de, hanh de, hang di
duc ban » duc tan, duc van, dua ban
va cham » va chat, va tham
vu nang » vuc nang, va nang, vu dang
cua tre » cua te, cuu tre, cua triet
v nang » va nang, van nang, voi nang
de cua » le cua, te cua, dieu cua
o hoi » co hoi, o hoc, o hai

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ((v nang) or (vu nang)) ((o hoi) or (x ho)). hieu va cham duc ban hang de cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((v nang) OR (vu nang)) ((o hoi) OR (x ho)). hieu va cham duc ban hang de cua tre.
• Adding a wildcard symbol may retrieve word variants: te sach ((v nang) or (vu nang)) ((o hoi) or (x ho)). hieu va cham duc ban hang de cua tre*.