Perhaps you should try some spelling variations:
thanh lap » thanh san, phan lap, thanh hai
ban thanh » ban hanh, ban hang
hoc sach » hoc sinh, hoc cac, hoc anh
hieu va » lieu va, hieu qua
lap cua » lai cua, tap cua, lam cua
duc ban » duc tan, duc van, dua ban
hieu ve » hieu van
sach ky » sac ky, sach y, sach ty
tay hoi » tay ho, tay thai
tao hoi » tao khoi, tao boi, thao hoc
ky sang » ky nang, ky dang, ky tang
cua tu » cua tuc, cua su, cua cu

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

• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sach ky sang ((tao hoi) OR (tay hoi)). ((hieu ve) OR (hieu va)) pham duc ban thanh lap cua tu~.
• Adding a wildcard symbol may retrieve word variants: hoc sach ky sang ((tao hoi) or (tay hoi)). ((hieu ve) or (hieu va)) pham duc ban thanh lap cua tu*.