Perhaps you should try some spelling variations:
khanh than » khanh thanh, khanh thuan, khan than
than cua » nhan cua, thai cua, ban cua
te sach » toc sach
sach ky » sac ky, sach y, sach ty
hieu va » lieu va, hieu qua
xuc van » luc van, vuc van, xuc ban
duc van » duc va, duc tan, duc manh
cua tre » cua te, cuu tre, cua triet
co hoi » co hoc, co loi
o hai » co hai, so hai, o lai

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ky nang ((co hoi) or (o hai)). hieu va cac ((xuc van) or (duc van)) khanh than cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang ((co hoi) OR (o hai)). hieu va cac ((xuc van) OR (duc van)) khanh than cua tre.
• Adding a wildcard symbol may retrieve word variants: te sach ky nang ((co hoi) or (o hai)). hieu va cac ((xuc van) or (duc van)) khanh than cua tre*.