Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hieu van » hieu va, thien van, lieu va
su sach » so sach, vu sach
van bac » van ban, van bao, van hac
bac day » bac dai, bac dan, bac thay
lai cua » dai cua, hai cua, lai chau
y nang » ly nang, v nang, may 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 ((y nang) OR (ky nang)) xa hoi. hieu van bac day ((va tinh) or (may tinh)) lai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((y nang) OR (ky nang)) xa hoi. hieu van bac day ((va tinh) OR (may tinh)) lai cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((y nang) OR (ky nang)) xa hoi. hieu van bac day ((va tinh) or (may tinh)) lai cua triet".
• Adding a wildcard symbol may retrieve word variants: su sach ((y nang) OR (ky nang)) xa hoi. hieu van bac day ((va tinh) or (may tinh)) lai cua triet*.