Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
thien van » thi van
thanh tai » thanh hai, thanh toan, doanh tai
nam buoc » nam duoc, nam quoc, nam thuoc
buoc ban » quoc ban, buon ban, duoc ban
tu sach » thu sach, su sach, te sach
nang xa » nang x, nang ma, mang xa
lang xa » lang ha, dang xay, lang van
tai cua » thai cua, tai cuc, tri cua
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 y ((nang xa) or (lang xa)) hoi. ((lieu va) or (thien van)) nam buoc ban thanh tai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y ((nang xa) OR (lang xa)) hoi. ((lieu va) OR (thien van)) nam buoc ban thanh tai cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sach y ((nang xa) or (lang xa)) hoi. ((lieu va) or (thien van)) nam buoc ban thanh tai cua tre*.