Perhaps you should try some spelling variations:
ban hanh » ban hang
dang cac » dung cac, dong cac, hang cac
thai cua » than cua, tai cuc, tri cua
bang cac » nang cao, hang ca, dung cac
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
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 cac) OR (bang cac)) phoi. 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 cac) OR (bang cac)) phoi. hieu va cam cua ban hanh ((vai cua) or (thai cua)) te~".
• Adding a wildcard symbol may retrieve word variants: te sach _ ((dang cac) OR (bang cac)) phoi. hieu va cam cua ban hanh ((vai cua) or (thai cua)) te*.