Perhaps you should try some spelling variations:
hieu vien » hieu hien, hieu viec, thieu nien
cau triet » cau trieu, su triet, cua triet
vien cac » vien bach, vien dai, vien da
van hanh » van thanh, ban hanh, van anh
hanh hai » thanh hai, nhanh hai, hang hai
cau treo » cau theo, cau tren, cau trieu
cac xuc » cam xuc, cac nuoc, chat xuc
xuc van » duc van, luc van, vuc van
su sac » su sach, su cac, su xac
sac ky » cac ky, sai ky
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: su sac ky nang o hoi. hieu vien cac xuc van hanh hai ((cau treo) or (cau triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sac ky nang o hoi. hieu vien cac xuc van hanh hai ((cau treo) OR (cau triet)).
• Adding a wildcard symbol may retrieve word variants: su sac ky nang o hoi. hieu vien cac xuc van hanh hai ((cau treo) or (cau triet))*.