Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
cach thuc » anh thuc, cac thu
cac thuc » cac thu, can thuc, cay thuc
hanh di » hanh vi, hanh de, hang di
va hanh » van hanh, va thanh, va danh
su sach » so sach, vu sach
mang xa » lang xa, mang may, dang xay
hieu ve » hieu va, hieu van
sach v » sach va, sach y, sach 2
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: su sach v ((mang xa) OR (nang x)) hoi. hieu ve ((cac thuc) OR (cach thuc)) va hanh di cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach v ((mang xa) or (nang x)) hoi. hieu ve ((cac thuc) OR (cach thuc)) va hanh di cua triet~".
• Adding a wildcard symbol may retrieve word variants: su sach v ((mang xa) or (nang x)) hoi. hieu ve ((cac thuc) OR (cach thuc)) va hanh di cua triet*.