Perhaps you should try some spelling variations:
hoc sach » hoc sinh, hoc cac
sai cua » dai cua, hai cua, lai cua
hieu va » lieu va, hieu qua
cua tre » cua te, cuu tre, cua triet
hoc anh » hoc nganh, hoc nhanh, ngoc anh
va dan » va dao, va dau, va dap
ca dan » cac dan, ca dao
va cam » va cham, va cac, va cao
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc sach) OR (hoc anh)) ky nang x hoi. hieu va cam xuc ((va dan) or (ca dan)) sai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc sach) OR (hoc anh)) ky nang x hoi. hieu va cam xuc ((va dan) OR (ca dan)) sai cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc sach) OR (hoc anh)) ky nang x hoi. hieu va cam xuc ((va dan) or (ca dan)) sai cua tre*".