Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
dinh viet » ninh viet, danh viet, trinh viet
tham doc » than doc, tham do, tham nuoc
danh vi » hanh vi, dinh vi, danh di
so sach » so sanh, bo sach, co sach
tang ma » mang may, tang van
nang ma » sang ma, nang cao, mang may
va tham » van tham, va cham, va thanh
doc va » duoc va, hoc va, duc va

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: so sach y ((nang ma) OR (tang ma)) hoi. lieu va tham doc va ((danh vi) or (dinh viet)) cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach y ((nang ma) OR (tang ma)) hoi. lieu va tham doc va ((danh vi) OR (dinh viet)) cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach y ((nang ma) OR (tang ma)) hoi. lieu va tham doc va ((danh vi) or (dinh viet)) cua triet".
• Adding a wildcard symbol may retrieve word variants: so sach y ((nang ma) OR (tang ma)) hoi. lieu va tham doc va ((danh vi) or (dinh viet)) cua triet*.