Perhaps you should try some spelling variations:
va triet » va thiet, va trien, ve triet
van hanh » van thanh, ban hanh, van anh
chau phu » chau phi, chau au, chau tho
chieu ke » hieu ky, hieu ve, hieu kem
hanh vu » hanh vi, hanh va, hanh tu
phu van » phuc van, chu van, phu san
su sach » vu sach
hieu ke » hieu kem, hieu ky, hieu ve
nang xa » nang x, lang xa, nang ma
xa nang » da nang, va nang, xa nong
so sach » so sanh, bo sach, co sach
vu va » vu van, tu va, su 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) OR (so sach)) xa nang xa hoi. ((hieu ke) or (chieu ke)) chau phu van hanh vu va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (so sach)) xa nang xa hoi. ((hieu ke) OR (chieu ke)) chau phu van hanh vu va triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) OR (so sach)) xa nang xa hoi. ((hieu ke) or (chieu ke)) chau phu van hanh vu va triet".
• Adding a wildcard symbol may retrieve word variants: ((su sach) OR (so sach)) xa nang xa hoi. ((hieu ke) or (chieu ke)) chau phu van hanh vu va triet*.