Perhaps you should try some spelling variations:
khanh thanh » nhanh thanh, thanh thanh, phan thanh
van khanh » van thanh, van hanh, van anh
hieu vien » hieu hien, hieu viec, thieu nien
thanh cu » thanh chu, thanh tu, thanh ca
vien cac » vien bach, vien dai, vien da
tu sach » thu sach, su sach, te sach
xuc van » duc van, luc van, vuc van
cac xuc » cam xuc, cac nuoc, chat xuc
cu tren » tu tren, dua tren
sach ky » sac ky, sach y, sach ty
so hai » son hai, su hai, so ha
o hai » co hai, o lai, _ hai
o hoi » co hoi, o hoc, o hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ky nang ((o hoi) or (((o hai) or (so hai)))). hieu vien cac xuc van khanh thanh cu tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang ((o hoi) OR (((o hai) OR (so hai)))). hieu vien cac xuc van khanh thanh cu tren.
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang ((o hoi) or (((o hai) or (so hai)))). hieu vien cac xuc van khanh thanh cu tren*.