Perhaps you should try some spelling variations:
chau triet » cau triet, cua triet, cau trieu
van nang » van quang, van ban, van dong
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
v nang » va nang, voi nang, vuc nang
luc va » tuc va, loc va

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 (van nang)) xa hoi. hieu vu nang ((luc va) or (duc va)) hanh lai chau triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((v nang) OR (van nang)) xa hoi. hieu vu nang ((luc va) OR (duc va)) hanh lai chau triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((v nang) OR (van nang)) xa hoi. hieu vu nang ((luc va) or (duc va)) hanh lai chau triet".
• Adding a wildcard symbol may retrieve word variants: su sach ((v nang) OR (van nang)) xa hoi. hieu vu nang ((luc va) or (duc va)) hanh lai chau triet*.