Perhaps you should try some spelling variations:
khanh than » khanh thanh, khanh thuan, khan than
van khanh » van thanh, van hanh, van anh
te sach » toc sach
cac xuc » cam xuc, cac nuoc, chat xuc
cua tre » cua te, cua triet, dua tren
xuc van » duc van, luc van, vuc van
cuu tre » cau tren, cau treo
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va, hieu van
co hoi » co hoc, co loi
ve cac » va cac, vien cac
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 ve cac xuc van khanh than ((cua tre) OR (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang ((co hoi) OR (o hai)). hieu ve cac xuc van khanh than ((cua tre) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky nang ((co hoi) or (o hai)). hieu ve cac xuc van khanh than ((cua tre) OR (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: te sach ky nang ((co hoi) or (o hai)). hieu ve cac xuc van khanh than ((cua tre) OR (cuu tre))*.