Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
danh dai » danh dau, danh di, danh sai
tu sach » thu sach, su sach, te sach
mai hoi » mai khoi, dai hoi, lai hoi
hieu ve » hieu va, hieu van
xa danh » va danh, dia danh, nam danh
y nang » ky nang, ly nang, v nang
ve nam » he nam, va nam, le nam
thu xa » thu xac, thu ha, thu xe

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach y nang ((xa hoi) or (mai hoi)). hieu ve nam thu xa danh dai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang ((xa hoi) OR (mai hoi)). hieu ve nam thu xa danh dai cua triet.
• Adding a wildcard symbol may retrieve word variants: tu sach y nang ((xa hoi) or (mai hoi)). hieu ve nam thu xa danh dai cua triet*.