Perhaps you should try some spelling variations:
hieu vien » hieu hien, hieu viec, thieu nien
vien dai » hien dai
dai thuc » dan thuc, dai thu, dai thua
can ban » toan ban
den cua » dien cua, de cua, ben cua
cua tre » cua te, cuu tre, cua triet
vu sai » vu hai, vu san, vu dai
sai ky » sac ky

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sai ky nang x ho. hieu vien dai thuc ((van ban) or (can ban)) den cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sai ky nang x ho. hieu vien dai thuc ((van ban) OR (can ban)) den cua tre.
• Adding a wildcard symbol may retrieve word variants: vu sai ky nang x ho. hieu vien dai thuc ((van ban) or (can ban)) den cua tre*.