Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
thanh lap » thanh san, phan lap, thanh hai
toc sach » hoc sach, doc sach, thuoc sach
sang tay » sang tao, sang tai, sang tac
sach ky » sac ky, sach y, sach ty
ky sang » ky nang, ky dang, ky tang
tay hoi » tay ho, tao hoi, tay thai
hieu ve » hieu van
hieu va » lieu va, hieu qua
duc ban » duc tan, duc van, dua ban
lap cua » lai cua, tap cua, lam cua
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach ky sang tay hoi. ((hieu ve) or (hieu va)) pham duc ban thanh lap cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ky sang tay hoi. ((hieu ve) OR (hieu va)) pham duc ban thanh lap cua te.
• Adding a wildcard symbol may retrieve word variants: toc sach ky sang tay hoi. ((hieu ve) or (hieu va)) pham duc ban thanh lap cua te*.