Perhaps you should try some spelling variations:
hieu vien » hieu hien, hieu viec, thieu nien
vien cac » vien bach, vien dai, vien da
van hanh » van thanh, ban hanh, van anh
thai cua » than cua, tri cua, dai cua
te sach » toc sach
sach ky » sac ky, sach y, sach ty
cac xuc » cam xuc, cac nuoc, chat xuc
xuc van » duc van, luc van, xuc ban
nang o » nang co, nang ho, nang ro
o hoi » co hoi, o hoc, o hai

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 o hoi. hieu vien cac xuc van hanh ((thai cua) or (tai cuc)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang o hoi. hieu vien cac xuc van hanh ((thai cua) OR (tai cuc)) tre.
• Adding a wildcard symbol may retrieve word variants: te sach ky nang o hoi. hieu vien cac xuc van hanh ((thai cua) or (tai cuc)) tre*.