Perhaps you should try some spelling variations:
khanh thanh » nhanh thanh, thanh thanh, phan thanh
hieu viec » nhieu viec, hieu ve, sieu viet
van khanh » van thanh, van hanh, van anh
thanh chu » thanh chau, thanh cha, thanh thu
viec dai » vien dai, viec tai, viec dat
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
dai xuc » dai xu, dai luoc, dai thuc
xuc van » duc van, luc van, vuc van
chu tre » cho tre, chu tri, cuu tre
co hai » co dai, co hoi, so hai
o hai » so hai, o lai, _ hai

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 hai) or (co hai)). hieu viec dai xuc van khanh thanh chu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang ((o hai) OR (co hai)). hieu viec dai xuc van khanh thanh chu tre.
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang ((o hai) or (co hai)). hieu viec dai xuc van khanh thanh chu tre*.