Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
thu sach » tu sach, thuat sach, thuoc sach
thanh da » thanh dat, thanh dam, thanh dan
sach ky » sac ky, sach y, sach ty
cuc ban » cua ban, cac ban, cuu ban
ve chat » va chat, van chat
ve cham » va cham, vu cham, ve chim
dong ha » dong hoa, dong va, dong hoc
dang xa » dang xay, lang xa, dang ha
cua tre » cua te, cuu tre, cua triet
da cua » dai cua, day cua, dan cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach ky ((dang xa) or (dong ha)) hoi. hieu ((ve cham) OR (ve chat)) cuc ban thanh da cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky ((dang xa) OR (dong ha)) hoi. hieu ((ve cham) OR (ve chat)) cuc ban thanh da cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ky ((dang xa) or (dong ha)) hoi. hieu ((ve cham) OR (ve chat)) cuc ban thanh da cua tre".
• Adding a wildcard symbol may retrieve word variants: thu sach ky ((dang xa) or (dong ha)) hoi. hieu ((ve cham) OR (ve chat)) cuc ban thanh da cua tre*.