Perhaps you should try some spelling variations:
ban thanh » ban hanh
ban hang » ngan hang
te sach » toc sach
cam cuc » cam xuc, cham cuu, pham cuc
hieu va » lieu va, hieu qua
sach ty » sach y, sach tu, sach thu
va cam » va cham, va cac, va cao
hang x » hoang xa, chang xu, hang nxb
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: te sach ty ((hang x) or (nang x)) hoi. hieu va cam cuc ((ban thanh) OR (ban hang)) dai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty ((hang x) OR (nang x)) hoi. hieu va cam cuc ((ban thanh) OR (ban hang)) dai cua te*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ty ((hang x) or (nang x)) hoi. hieu va cam cuc ((ban thanh) OR (ban hang)) dai cua te*".