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
ky dang » ky danh
lap cua » lai cua, tap cua, lam cua
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
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 dang) OR (ky nang)) 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 dang) OR (ky nang)) tay hoi. ((hieu ve) OR (hieu va)) pham duc ban thanh lap cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ((ky dang) OR (ky nang)) 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 dang) OR (ky nang)) tay hoi. ((hieu ve) or (hieu va)) pham duc ban thanh lap cua te*.