Perhaps you should try some spelling variations:
ban hang » ngan hang
vu sach » vu bach, su sach, vu khach
lang xa » lang ha, dang xay, lang van
hieu va » lieu va, hieu qua
va cham » va chat, va tham
cham so » cham soc, cham o, ham so
hai cua » thai cua, hoi cua, lai cua
so ban » sao ban, so bang, co ban

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 _ lang xa hoi. hieu va cham so ban hang ((hai cua) or (dai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach _ lang xa hoi. hieu va cham so ban hang ((hai cua) OR (dai cua)) tre.
• Adding a wildcard symbol may retrieve word variants: vu sach _ lang xa hoi. hieu va cham so ban hang ((hai cua) or (dai cua)) tre*.