Perhaps you should try some spelling variations:
cua triet » su triet, va triet
van hanh » van thanh, ban hanh, van anh
cua viet » ca viet, hoa viet, cua vat
mai hoi » mai khoi, dai hoi, lai hoi
hieu ve » hieu va, hieu van
xuc van » duc van, luc van, xuc ban
su dai » sau dai, si dai, su tai
dai ky » dan ky, dai ly, sai ky
ve cam » ve cham, ve cac, va cam

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

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