Perhaps you should try some spelling variations:
thanh doi » thanh loi, thanh moi, thanh do
cua triet » cua viet, su triet, va triet
cau luoc » cau luc, muu luoc, hau loc
luoc gia » quoc gia, luc gia, luong gia
tu sach » thu sach, su sach, te sach
xay hoi » xa hoi, tay hoi, cay phoi
hieu ve » hieu va, hieu van
doi cua » dai cua, hoi cua
ky van » ty van, ky va
ly van » le van, ly va, ly von

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