Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
bang hai » hang hai, dang hai, lang hai
ban bang » ban hang, can bang, ba bang
hai cua » thai cua, dai cua, hoi cua
duc ban » duc tan, duc van, dua ban
cam duc » cam xuc, cao duc, pham duc
hieu va » lieu va
sach ty » sach y, sach tu, sach thu
tang ma » mang may, tang van
lang xa » lang ha, dang xay, lang van
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 ((lang xa) or (tang ma)) hoi. ((hieu va) OR (hieu qua)) cam duc ban bang hai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ty ((lang xa) OR (tang ma)) hoi. ((hieu va) OR (hieu qua)) cam duc ban bang hai cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ty ((lang xa) or (tang ma)) hoi. ((hieu va) OR (hieu qua)) cam duc ban bang hai cua te".
• Adding a wildcard symbol may retrieve word variants: thu sach ty ((lang xa) or (tang ma)) hoi. ((hieu va) OR (hieu qua)) cam duc ban bang hai cua te*.