Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
thanh vi » hanh vi, thanh va, thanh ve
vu sach » vu bach, su sach, vu khach
sach ky » sac ky, sach y, sach ty
cac tuc » cac toc, cac tac, cac nuoc
lang xa » dang xay, lang van
lang ha » long ha
cua tre » cua te, cuu tre, cua triet
cac tu » cac thu, cach tu, cac du
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach ky ((lang xa) OR (lang ha)) hoi. lieu va ((cac tuc) or (cac tu)) ban thanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ky ((lang xa) OR (lang ha)) hoi. lieu va ((cac tuc) OR (cac tu)) ban thanh vi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach ky ((lang xa) OR (lang ha)) hoi. lieu va ((cac tuc) or (cac tu)) ban thanh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: vu sach ky ((lang xa) OR (lang ha)) hoi. lieu va ((cac tuc) or (cac tu)) ban thanh vi cua tre*.