Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
ban hang » ngan hang
ban bang » can bang, ba bang, ban banh
hai cua » thai cua, dai cua, hoi cua
hieu va » lieu va, hieu qua
sach ty » sach y, sach tu, sach thu
nang xa » nang x, lang xa, nang ma
va cam » va cham, va cac, va cao
cua te » cua tu

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 ty ((nang xa) or (nang cao)) hoi. hieu va cam xuc ((ban bang) OR (ban hang)) hai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ty ((nang xa) OR (nang cao)) hoi. hieu va cam xuc ((ban bang) OR (ban hang)) hai cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ty ((nang xa) or (nang cao)) hoi. hieu va cam xuc ((ban bang) OR (ban hang)) hai cua te".
• Adding a wildcard symbol may retrieve word variants: thu sach ty ((nang xa) or (nang cao)) hoi. hieu va cam xuc ((ban bang) OR (ban hang)) hai cua te*.