Perhaps you should try some spelling variations:
thanh hai » thanh phan, thanh hoa, thanh san
ban thanh » ban hanh, ban hang
toc sach » hoc sach, doc sach, thuoc sach
van cau » van dau, van hau, van chat
hai cuc » tai cuc, hai cua, thai cua
dua ban » dia ban, cua ban, qua ban
van cam » van nam, van lam, van dam
mai hoi » mai khoi, dai hoi, lai hoi
ty nang » ky nang, ty hang, ly nang
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) OR (van cau)) 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) OR (van cau)) dua ban thanh hai cuc tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ((ty nang) or (ty xang)) mai hoi. hieu ((van cam) OR (van cau)) 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) OR (van cau)) dua ban thanh hai cuc tre*.