Perhaps you should try some spelling variations:
ban hanh » ban hang
cay phoi » cap phoi, cay cho, gap phoi
thai cua » than cua, tai cuc, tri cua
te sach » toc sach
vai cua » dai cua, hai cua, lai cua
hieu va » lieu va, hieu qua
cam cua » ca cua, nam cua, cau cua
tay hoi » tay ho, tao hoi, tay thai
va cam » va cham, va cac, va cao

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

• If you are trying to use Boolean operators, they must be ALL CAPS: te sach _ dang ((cay phoi) OR (tay hoi)). hieu va cam cua ban hanh ((vai cua) OR (thai cua)) te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach _ dang ((cay phoi) OR (tay hoi)). hieu va cam cua ban hanh ((vai cua) or (thai cua)) te~".
• Adding a wildcard symbol may retrieve word variants: te sach _ dang ((cay phoi) OR (tay hoi)). hieu va cam cua ban hanh ((vai cua) or (thai cua)) te*.