Perhaps you should try some spelling variations:
cua triet » cua viet, su triet
va triet » va thiet, va trien, ve triet
van hanh » van thanh, ban hanh, van anh
xuc van » duc van, luc van, xuc ban
hieu ve » hieu va, hieu van
mai hoi » mai khoi, dai hoi, lai hoi
sai ky » sac ky
ve cam » ve cham, ve cac, va cam
ma hoi » xa hoi, ma hoa, me hoi
su sai » su tai, su hai, su dai

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