Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
thanh moi » thanh loi, thanh hoa, thanh hai
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
cau hoa » cau hoi
hoa ban » hoa dan, hoa van, hoa han
moi cua » hoi cua, doi cua, moi quan
cua tre » cua te, cuu tre, cua triet

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ky nang xa hoi. ((hieu ve) or (lieu va)) cau hoa ban thanh moi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang xa hoi. ((hieu ve) OR (lieu va)) cau hoa ban thanh moi cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang xa hoi. ((hieu ve) or (lieu va)) cau hoa ban thanh moi cua tre*.