Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
va thanh » gia thanh, va tinh, le thanh
su sach » vu sach
so sach » so sanh, bo sach, co sach
vai cuu » vai cua
cuu tre » cua tre, cau tren, cau treo
va cam » va cham, va cac, va cao
cam tu » cam thu, nam tu, dam tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((su sach) or (so sach)) ky nang x ho. lieu va cam tu ((va thanh) OR (ban thanh)) vai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (so sach)) ky nang x ho. lieu va cam tu ((va thanh) OR (ban thanh)) vai cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (so sach)) ky nang x ho. lieu va cam tu ((va thanh) OR (ban thanh)) vai cuu tre".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (so sach)) ky nang x ho. lieu va cam tu ((va thanh) OR (ban thanh)) vai cuu tre*.