Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
cac nuoc » cap nuoc, hoc nuoc, dat nuoc
manh cua » doanh cua, ban cua
so sach » so sanh, bo sach, hoc sach
co sach » bo sach, cuon sach, hoc sach
ty nang » ky nang, ty xang, ty hang
hieu ve » hieu va, hieu van
va manh » van manh, va danh, va hanh
cua cua » cua chua, ca cua, qua cua
ve cac » va cac, vien cac
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 (co sach)) ty nang ((x hoi) or (xa hoi)). hieu ve cac nuoc va manh cua cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((so sach) OR (co sach)) ty nang ((x hoi) OR (xa hoi)). hieu ve cac nuoc va manh cua cua triet.
• Adding a wildcard symbol may retrieve word variants: ((so sach) or (co sach)) ty nang ((x hoi) or (xa hoi)). hieu ve cac nuoc va manh cua cua triet*.