Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hieu van » hieu va, thien van, lieu va
van hanh » van thanh, ban hanh, van anh
so sach » so sanh, bo sach, co sach
te sach » toc sach
nam xuc » cam xuc, nam xua, nam thuc
xuc van » duc van, luc van, xuc ban
hanh va » hang va, hanh vi
va cua » va chua, via cua, ca cua
x hoi » o hoi, x ho, 5 hoi

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((so sach) or (te sach)) ky nang ((x hoi) OR (xa hoi)). hieu van nam xuc van hanh va cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((so sach) OR (te sach)) ky nang ((x hoi) OR (xa hoi)). hieu van nam xuc van hanh va cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((so sach) or (te sach)) ky nang ((x hoi) OR (xa hoi)). hieu van nam xuc van hanh va cua triet".
• Adding a wildcard symbol may retrieve word variants: ((so sach) or (te sach)) ky nang ((x hoi) OR (xa hoi)). hieu van nam xuc van hanh va cua triet*.