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
sach ky » sac ky, sach y, sach ty
van bac » van ban, van bao, van hac
van hoc » van hoa
truc va » thuc va, thuc vat, trung va
va danh » va dinh, va dan, va hanh
ma hoi » mai hoi, ma hoa, me hoi

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

• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang ((ma hoi) OR (xa hoi)). hieu ((van bac) OR (van hoc)) truc va danh dai cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang ((ma hoi) OR (xa hoi)). hieu ((van bac) or (van hoc)) truc va danh dai cua triet~".
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang ((ma hoi) OR (xa hoi)). hieu ((van bac) or (van hoc)) truc va danh dai cua triet*.