Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
thanh hai » thanh phan, thanh hoa, thanh san
toc sach » hoc sach, doc sach, thuoc sach
hieu van » hieu va, thien van, lieu va
ty nang » ky nang, ty hang, ly nang
mai hoi » mai khoi, dai hoi, lai hoi
van cam » van nam, van lam, van cau
cam dua » ca dua, cay dua, chay dua
dua ban » dia ban, cua ban, qua ban
hai cuc » tai cuc, hai cua, thai cua
cuc tre » duc tre, cua tre, cuu tre

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) or (ty xang)) mai hoi. hieu van cam dua ban thanh hai cuc tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ((ty nang) OR (ty xang)) mai hoi. hieu van cam dua ban thanh hai cuc tre.
• Adding a wildcard symbol may retrieve word variants: toc sach ((ty nang) or (ty xang)) mai hoi. hieu van cam dua ban thanh hai cuc tre*.