Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hanh di » hanh vi, hanh de, hang di
va hanh » van hanh, va thanh, va danh
cam duc » cam xuc, cao duc, pham duc
hieu va » lieu va, hieu qua
khac ty » khac thi
vu khac » vu kham, vu khanh, bui khac
hieu ve » hieu van
tang ma » tang van
di cua » dai cua, doi cua, de cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu khac ty ((tang ma) or (mang may)) hoi. ((hieu ve) OR (hieu va)) cam duc va hanh di cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu khac ty ((tang ma) OR (mang may)) hoi. ((hieu ve) OR (hieu va)) cam duc va hanh di cua triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu khac ty ((tang ma) or (mang may)) hoi. ((hieu ve) OR (hieu va)) cam duc va hanh di cua triet*".