Perhaps you should try some spelling variations:
ban danh » ban doanh, ban hanh, ban dan
qua cac » cua cac
hai cua » thai cua, hoi cua, lai cua
cuc ban » cua ban, cac ban, cuu ban
cac cuc » cac cuoc, cac cua, cac nuoc
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
nang ma » tang ma, sang ma, nang cao
nang xa » nang x, lang xa, mang xa

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ty ((nang xa) or (nang ma)) hoi. hieu qua cac cuc ban danh ((hai cua) or (dai cua)) tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty ((nang xa) OR (nang ma)) hoi. hieu qua cac cuc ban danh ((hai cua) OR (dai cua)) tu.
• Adding a wildcard symbol may retrieve word variants: tu sach ty ((nang xa) or (nang ma)) hoi. hieu qua cac cuc ban danh ((hai cua) or (dai cua)) tu*.