Perhaps you should try some spelling variations:
hoc sach » hoc sinh, hoc cac, hoc anh
vai cuu » vai cua
hieu ve » hieu va, hieu van
cuu tre » cua tre, cau tren, cau treo
ky danh » ky anh
ky dang » ky nang
va dan » ca dan, va dao, va dap
va dau » va dao
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 ((ky dang) OR (ky danh)) xa hoi. hieu ve cam xuc ((va dan) OR (va dau)) vai cuu tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc sach ((ky dang) or (ky danh)) xa hoi. hieu ve cam xuc ((va dan) OR (va dau)) vai cuu tre~".
• Adding a wildcard symbol may retrieve word variants: hoc sach ((ky dang) or (ky danh)) xa hoi. hieu ve cam xuc ((va dan) OR (va dau)) vai cuu tre*.