Perhaps you should try some spelling variations:
ban thanh » ban hang
chat duc » chat xuc, chat doc, chet duoc
ban hanh » ban hang
so sach » so sanh, bo sach, co sach
sach ky » sac ky, sach y, sach ty
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
va chat » van chat, va phat, cao chat
di cua » dai cua, doi cua, de 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: so sach ky lang xa hoi. lieu va chat duc ((ban thanh) or (ban hanh)) di cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ky lang xa hoi. lieu va chat duc ((ban thanh) OR (ban hanh)) di cua te.
• Adding a wildcard symbol may retrieve word variants: so sach ky lang xa hoi. lieu va chat duc ((ban thanh) or (ban hanh)) di cua te*.