Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
nham thuc » nhan thuc, nam thuc, nham thu
cham tuc » pham thuc, tham thuc, cham soc
dang xay » dang van, van xay
hieu ve » hieu va, hieu van
te sach » toc sach
lang xa » lang ha, lang van
sach v » sach va, sach y, sach 2
va dau » va dao
dau di » da di, dau da, dau do
di cua » dai cua, doi cua, de cua

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: te sach v ((lang xa) OR (dang xay)) hoi. hieu ve ((cham tuc) OR (nham thuc)) va dau di cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach v ((lang xa) or (dang xay)) hoi. hieu ve ((cham tuc) OR (nham thuc)) va dau di cua triet~".
• Adding a wildcard symbol may retrieve word variants: te sach v ((lang xa) or (dang xay)) hoi. hieu ve ((cham tuc) OR (nham thuc)) va dau di cua triet*.