Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
hoc sach » hoc cac, hoc anh
dang mai » dang hai, dang mau, dang bai
ky dang » ky nang, ky danh
mai hoi » mai khoi, dai hoi, lai hoi
hieu ve » hieu va, hieu van
xuc ban » duc ban, cuc ban, quoc ban
hai cua » thai cua, hoi cua, lai cua
ve cam » ve cham, ve cac, va cam

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: ((hoc sach) OR (hoc sinh)) ky dang mai hoi. hieu ve cam xuc ban thanh ((dai cua) OR (hai cua)) tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc sach) OR (hoc sinh)) ky dang mai hoi. hieu ve cam xuc ban thanh ((dai cua) or (hai cua)) tre~".
• Adding a wildcard symbol may retrieve word variants: ((hoc sach) OR (hoc sinh)) ky dang mai hoi. hieu ve cam xuc ban thanh ((dai cua) or (hai cua)) tre*.