Perhaps you should try some spelling variations:
hoc sach » hoc sinh, hoc cac, hoc anh
hang hai » hoang hai, hang tai, thanh hai
cap phoi » cap cho
hanh hai » thanh hai, nhanh hai, hanh tai
cua tre » cua te, cuu tre, cua triet
xuc ban » duc ban, cuc ban, quoc ban
hieu va » lieu va, hieu qua
ky dang » ky danh
va cam » va cham, va cac, va cao

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 ((ky dang) or (ky nang)) cap phoi. hieu va cam xuc ban ((hanh hai) OR (hang hai)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sach ((ky dang) OR (ky nang)) cap phoi. hieu va cam xuc ban ((hanh hai) OR (hang hai)) cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc sach ((ky dang) or (ky nang)) cap phoi. hieu va cam xuc ban ((hanh hai) OR (hang hai)) cua tre*".