Perhaps you should try some spelling variations:
ban hanh » ban hang
lang van » dang van, tang van, hoang van
tu sach » thu sach, su sach, te sach
hanh va » hang va, hanh vi
duc ban » duc tan, duc van, dua ban
sach ky » sac ky, sach y, sach ty
va cham » va chat, va tham
lang xa » lang ha, dang xay
che tre » cho tre, khoe tre, choi tre
va cao » va cac, va co, va dao

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 ((lang xa) OR (lang van)) hoi. lieu ((va cham) or (va cao)) duc ban hanh va che tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky ((lang xa) OR (lang van)) hoi. lieu ((va cham) OR (va cao)) duc ban hanh va che tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky ((lang xa) OR (lang van)) hoi. lieu ((va cham) or (va cao)) duc ban hanh va che tre".
• Adding a wildcard symbol may retrieve word variants: tu sach ky ((lang xa) OR (lang van)) hoi. lieu ((va cham) or (va cao)) duc ban hanh va che tre*.