Perhaps you should try some spelling variations:
nhanh thai » nhanh thi, nhanh thanh, nhanh thang
khanh thai » khanh thanh, khanh thuan, thanh hai
thu sach » tu sach, thuat sach, thuoc sach
xuc van » duc van, luc van, vuc van
cac xuc » cam xuc, cac nuoc, chat xuc
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va, hieu van
cuu tre » cua tre, cau tren, cau treo
ve cac » va cac, vien cac
co hai » co dai, o hai, so hai
co hoi » co hoc, co loi

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach ky nang ((co hoi) or (co hai)). hieu ve cac xuc van ((khanh thai) OR (nhanh thai)) cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky nang ((co hoi) OR (co hai)). hieu ve cac xuc van ((khanh thai) OR (nhanh thai)) cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ky nang ((co hoi) or (co hai)). hieu ve cac xuc van ((khanh thai) OR (nhanh thai)) cuu tre".
• Adding a wildcard symbol may retrieve word variants: thu sach ky nang ((co hoi) or (co hai)). hieu ve cac xuc van ((khanh thai) OR (nhanh thai)) cuu tre*.