Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
duoc van » duoc va, duc van, duoc ban
van hanh » van thanh, ban hanh, van anh
hanh vai » hanh vi, hanh va, hanh tai
su sach » so sach, vu sach
ly nang » ly hang, ly vang, ly quang
vai cua » dai cua, hai cua, lai cua

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 ((ly nang) OR (ky nang)) xa hoi. thien ((van lam) or (van nam)) duoc van hanh vai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((ly nang) OR (ky nang)) xa hoi. thien ((van lam) OR (van nam)) duoc van hanh vai cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((ly nang) OR (ky nang)) xa hoi. thien ((van lam) or (van nam)) duoc van hanh vai cua triet".
• Adding a wildcard symbol may retrieve word variants: su sach ((ly nang) OR (ky nang)) xa hoi. thien ((van lam) or (van nam)) duoc van hanh vai cua triet*.