Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
thanh di » thanh doi, thanh de, thanh do
su sach » so sach, vu sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
nang ma » tang ma, sang ma, nang cao
va pham » van pham, va phat, va phan
va phap » va phat
thu ban » thu hang
cua tre » cua te, cuu tre, cua triet
ma hoi » mai hoi, xa hoi, ma hoa
di cua » dai cua, doi cua, de cua

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 ty nang ma hoi. hieu ((va pham) OR (((va phap) OR (ban phap)))) thu ban thanh di cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ty nang ma hoi. hieu ((va pham) or (((va phap) OR (ban phap)))) thu ban thanh di cua tre~".
• Adding a wildcard symbol may retrieve word variants: su sach ty nang ma hoi. hieu ((va pham) or (((va phap) OR (ban phap)))) thu ban thanh di cua tre*.