Perhaps you should try some spelling variations:
ban thanh » ban hang
ban hanh » ban hang
so sach » so sanh, bo sach, co sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
nang xa » nang x, lang xa, nang ma
thi van » thi lan, thi hanh, thi nang
cua tre » cua te, cuu tre, cua triet
ca cua » co cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach ty nang xa hoi. thi van nam thu ((ban thanh) or (ban hanh)) ca cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ty nang xa hoi. thi van nam thu ((ban thanh) OR (ban hanh)) ca cua tre.
• Adding a wildcard symbol may retrieve word variants: so sach ty nang xa hoi. thi van nam thu ((ban thanh) or (ban hanh)) ca cua tre*.