Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
thanh vi » hanh vi, thanh va, thanh ve
su sach » vu sach
so sach » so sanh, bo sach, co sach
ty hang » ly hang, ty xang, thi hang
hang ca » hang va, nang cao, hang tai
hieu va » lieu va, hieu qua
va pham » van pham, va phat, va phap
duc ban » duc tan, duc van, dua ban
ca hoi » cau hoi, cua hoi, xa hoi
vi cua » vai cua, di cua
cua te » cua tu

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: ((su sach) OR (so sach)) ty hang ca hoi. hieu va pham duc ban thanh vi cua te~.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (so sach)) ty hang ca hoi. hieu va pham duc ban thanh vi cua te*.