Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
toc sach » hoc sach, doc sach, thuoc sach
cham dua » chay dua, cham giua, pham duc
nang mai » nang ma, nang tai, lang mai
mai hoi » mai khoi, dai hoi, lai hoi
hieu va » lieu va, hieu qua
va cham » va chat, va tham
sach ty » sach y, sach tu, sach thu
dua ban » dia ban, cua ban, qua ban
ty nang » ky nang, ty xang, ty hang
hai cuc » tai cuc, thai cua, hai huoc
hai cua » thai cua, dai cua, hoi cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach ty nang mai hoi. hieu va cham dua ban thanh ((hai cuc) or (hai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ty nang mai hoi. hieu va cham dua ban thanh ((hai cuc) OR (hai cua)) tre.
• Adding a wildcard symbol may retrieve word variants: toc sach ty nang mai hoi. hieu va cham dua ban thanh ((hai cuc) or (hai cua)) tre*.