Perhaps you should try some spelling variations:
thanh tai » thanh hai, thanh toan, doanh tai
ban thanh » ban hanh, ban hang
su triet » su viet, su tien, ve triet
sach thu » sach thue, sach thieu, sach tham
luc ban » duc ban, cuc ban, luc bat
so sach » so sanh, bo sach, co sach
tang ma » tang van
va cham » va chat, va tham
tai su » tai so, tai tu, lai su

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach thu ((mang may) or (tang ma)) hoi. lieu ((va cham) or (va cac)) luc ban thanh tai su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach thu ((mang may) OR (tang ma)) hoi. lieu ((va cham) OR (va cac)) luc ban thanh tai su triet.
• Adding a wildcard symbol may retrieve word variants: so sach thu ((mang may) or (tang ma)) hoi. lieu ((va cham) or (va cac)) luc ban thanh tai su triet*.