Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
vu sach » vu bach, su sach, vu khach
sach ky » sac ky, sach y, sach ty
cua tre » cua te, cuu tre, cua triet
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
ve coc » ve cuoc, ve cac
ca cua » co cua
ve co » vo co, va co, de co

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach ky lang xa hoi. hieu ((ve coc) OR (ve co)) luc ((ban thanh) or (gia thanh)) ca cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ky lang xa hoi. hieu ((ve coc) OR (ve co)) luc ((ban thanh) OR (gia thanh)) ca cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach ky lang xa hoi. hieu ((ve coc) OR (ve co)) luc ((ban thanh) or (gia thanh)) ca cua tre*".