Perhaps you should try some spelling variations:
ban hang » ngan hang
vu sach » vu bach, su sach, vu khach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
qua cac » cua cac
cac dac » cac dan, cac dai, cac bac
dac ban » cac ban, dac san, duc ban
bai cua » ban cua, dai cua, bai ca
hai cua » thai cua, dai cua, hoi cua
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach ty nang x hoi. hieu qua cac dac ban hang ((bai cua) or (hai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ty nang x hoi. hieu qua cac dac ban hang ((bai cua) OR (hai cua)) tre*.