Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
dang hai » dang khai, hang hai, dung hai
van dang » van dong, van dung, van nang
xay hoi » xa hoi, tay hoi, cay phoi
hieu va » lieu va, hieu qua
cam duc » cam xuc, cao duc, pham duc
duc van » duc va, duc tan, duc manh
ky danh » ky dang
hai cua » thai cua, dai cua, hoi cua
cua tre » cua te, cuu tre, cua triet
ky anh » ly anh, ty anh
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: toc sach ((((ky danh) or (ky anh))) or (ky nang)) xay hoi. hieu va cam duc van dang hai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ((((ky danh) OR (ky anh))) OR (ky nang)) xay hoi. hieu va cam duc van dang hai cua tre.
• Adding a wildcard symbol may retrieve word variants: toc sach ((((ky danh) or (ky anh))) or (ky nang)) xay hoi. hieu va cam duc van dang hai cua tre*.