Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
van hanh » van thanh, ban hanh, van anh
duc van » duc va, duc tan, duc manh
cam duc » cam xuc, cao duc, pham duc
hieu ve » hieu va, hieu van
mai hoi » mai khoi, dai hoi, lai hoi
ma hoi » xa hoi, ma hoa, me hoi
ve cam » ve cham, ve cac, va cam
su tai » su thi, tu tai
vi cua » vai cua, di cua
su sai » su hai, su dai, su mai

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((su sai) OR (su tai)) ky nang ((ma hoi) or (mai hoi)). hieu ve cam duc van hanh vi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sai) OR (su tai)) ky nang ((ma hoi) OR (mai hoi)). hieu ve cam duc van hanh vi cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sai) OR (su tai)) ky nang ((ma hoi) or (mai hoi)). hieu ve cam duc van hanh vi cua triet".
• Adding a wildcard symbol may retrieve word variants: ((su sai) OR (su tai)) ky nang ((ma hoi) or (mai hoi)). hieu ve cam duc van hanh vi cua triet*.