Perhaps you should try some spelling variations:
va triet » va thiet, va trien, ve triet
chau phu » chau phi, chau au, chau tho
van hanh » van thanh, ban hanh, van anh
bo sach » co sach, hoc sach
xa nang » da nang, va nang, xa nong
nang xa » nang x, lang xa, nang ma
hieu ke » hieu kem, chieu ke, hieu ky
ke chau » ke cau, ky chau, ke chiu
so sach » so sanh, co sach, hoc sach
phu van » phuc van, chu van, phu san
hanh vu » hanh vi, hanh va, hanh tu
su sach » vu 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) OR (bo sach)))) xa nang xa hoi. hieu 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) OR (bo sach)))) xa nang xa hoi. hieu 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) OR (bo sach)))) xa nang xa hoi. hieu ke chau phu van hanh vu va triet".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (((so sach) OR (bo sach)))) xa nang xa hoi. hieu ke chau phu van hanh vu va triet*.