Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
tich cac » tich va, tich bao
tinh cac » tinh cach, trinh cac, tinh bac
hieu van » hieu va, thien van, lieu va
tang ma » mang may, tang van
sanh ky » hanh ky, sang ky, nganh ky
nam luc » nang luc, nhan luc, nam thuc
sang ma » nang ma, sang tao, mang may
so sanh » do sanh
luc va » duc va, tuc va, loc va

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: so sanh ky ((sang ma) OR (tang ma)) hoi. hieu van nam luc va ((tinh cac) OR (tich cac)) cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sanh ky ((sang ma) or (tang ma)) hoi. hieu van nam luc va ((tinh cac) OR (tich cac)) cua triet~".
• Adding a wildcard symbol may retrieve word variants: so sanh ky ((sang ma) or (tang ma)) hoi. hieu van nam luc va ((tinh cac) OR (tich cac)) cua triet*.