Perhaps you should try some spelling variations:
thanh dai » thanh hai, thanh tai, thanh dat
ban thanh » ban hanh, ban hang
thu sach » tu sach, thuat sach, thuoc sach
cau tren » cu tren, dau tren, ca tren
sach ky » sac ky, sach y, sach ty
xuc ban » duc ban, cuc ban, quoc ban
dai cau » dat cau, da cau, dai hau
va cam » va cham, va cac, va cao
va dao » ca dao

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach ky ((nang cao) or (nang x)) hoi. hieu ((va cam) or (va dao)) xuc ban thanh dai cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky ((nang cao) OR (nang x)) hoi. hieu ((va cam) OR (va dao)) xuc ban thanh dai cau tren.
• Adding a wildcard symbol may retrieve word variants: thu sach ky ((nang cao) or (nang x)) hoi. hieu ((va cam) or (va dao)) xuc ban thanh dai cau tren*.