Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
dinh viet » ninh viet, danh viet, trinh viet
tham soc » cham soc, tham nuoc, thai son
danh vi » hanh vi, dinh vi, danh di
so sach » bo sach, co sach, hoc sach
so sanh » do sanh
tang ma » mang may, tang van
va tham » van tham, va cham, va thanh
soc va » hoc va, loc va, doc va
y tang » ky tang, 6 tang, 7 tang

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