Perhaps you should try some spelling variations:
ban hang » ngan hang
cham luc » cham soc, nhan luc, cham cuu
qua cham » qua hai, qua cac, va cham
te sach » toc sach
hang de » hoang de, hanh de, hang di
luc ban » duc ban, cuc ban, luc bat
cua tre » cua te, cuu tre, cua triet
vu nang » vuc nang, va nang, vu dang
v nang » va nang, van nang, voi nang
de cua » le cua, te cua, dieu cua
o hai » co hai, so hai, o lai

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 hai) or (x ho)). hieu qua cham luc 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 hai) OR (x ho)). hieu qua cham luc ban hang de cua tre.
• Adding a wildcard symbol may retrieve word variants: te sach ((v nang) or (vu nang)) ((o hai) or (x ho)). hieu qua cham luc ban hang de cua tre*.