Perhaps you should try some spelling variations:
chau triet » cau triet, cua triet, cau trieu
voi nang » voi hang, hoi nang, voi rang
van hanh » van thanh, ban hanh, van anh
hanh lai » hanh lam, hanh tai, thanh lap
su sach » so sach, vu sach
hieu vu » hieu va, hieu ve, hieu su
vu nang » vuc nang, va nang, vu dang
luc van » luoc van, luu van, duc van
v nang » va nang, van nang, vuc nang

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ((v nang) or (voi nang)) xa hoi. hieu vu nang luc van hanh lai chau triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((v nang) OR (voi nang)) xa hoi. hieu vu nang luc van hanh lai chau triet.
• Adding a wildcard symbol may retrieve word variants: su sach ((v nang) or (voi nang)) xa hoi. hieu vu nang luc van hanh lai chau triet*.