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
ve triet » va trien, su triet
ky lang » ky nang, ky dang, ky tang
lang ha » long ha
cac xuc » cam xuc, cac nuoc, chat xuc
va hanh » va thanh, va danh, ban hanh
te sac » te sach, te cac, te san
sac ky » cac ky, sai ky
ha hoi » hoa hoi, ha noi, xa hoi
ve ve » de ve, va ve, ke ve

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sac ky lang ha hoi. hieu vien cac xuc ((va hanh) or (van hanh)) ve ve triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ky lang ha hoi. hieu vien cac xuc ((va hanh) OR (van hanh)) ve ve triet.
• Adding a wildcard symbol may retrieve word variants: te sac ky lang ha hoi. hieu vien cac xuc ((va hanh) or (van hanh)) ve ve triet*.