Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
toc sach » hoc sach, doc sach, thuoc sach
va thanh » gia thanh, va tinh, le thanh
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
van cac » van hac, van bac, dan cac
van cau » van dau, van hau, van chat
dai cuu » dai cua, dai huu
cuu tre » cua tre, cau tren, cau treo
x hoi » xa hoi, o hoi, x ho

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 x hoi. hieu ((van cac) or (van cau)) duc ((va thanh) OR (ban thanh)) dai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ty nang x hoi. hieu ((van cac) OR (van cau)) duc ((va thanh) OR (ban thanh)) dai cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ty nang x hoi. hieu ((van cac) or (van cau)) duc ((va thanh) OR (ban thanh)) dai cuu tre".
• Adding a wildcard symbol may retrieve word variants: toc sach ty nang x hoi. hieu ((van cac) or (van cau)) duc ((va thanh) OR (ban thanh)) dai cuu tre*.