Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thanh doi » thanh loi, thanh moi, thanh do
doi cua » dai cua, hoi cua
luc gia » luoc gia, duc gia, quoc gia
cau luc » cau truc, cau phuc
tu sach » thu sach, su sach, te sach
xay hoi » xa hoi, tay hoi, cay phoi
ky danh » ky anh
ky dang » ky nang
hieu ve » hieu va, hieu van

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 ((ky dang) OR (ky danh)) xay hoi. ((hieu ve) or (lieu va)) cau luc gia thanh doi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((ky dang) OR (ky danh)) xay hoi. ((hieu ve) OR (lieu va)) cau luc gia thanh doi cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((ky dang) OR (ky danh)) xay hoi. ((hieu ve) or (lieu va)) cau luc gia thanh doi cua triet".
• Adding a wildcard symbol may retrieve word variants: tu sach ((ky dang) OR (ky danh)) xay hoi. ((hieu ve) or (lieu va)) cau luc gia thanh doi cua triet*.