Perhaps you should try some spelling variations:
hieu vien » hieu hien, hieu viec, thieu nien
mai khoi » mai khoa, tai khoa, cac khoi
vien cac » vien bach, vien dai, vien da
van hanh » van thanh, ban hanh, van anh
hanh lai » hanh lam, hanh tai, thanh lap
su triet » su viet, su tien, ve triet
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
cac xuc » cam xuc, cac nuoc, chat xuc
xuc van » duc van, luc van, vuc van

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 ((mai khoi) or (xa hoi)). hieu vien cac xuc van hanh lai su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang ((mai khoi) OR (xa hoi)). hieu vien cac xuc van hanh lai su triet.
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang ((mai khoi) or (xa hoi)). hieu vien cac xuc van hanh lai su triet*.