Perhaps you should try some spelling variations:
va triet » va thiet, va trien, ve triet
thu san » thuy san, thu ban, phu san
hieu va » lieu va, hieu qua
va nhan » van nhan, ca nhan, va phan
luc ban » duc ban, cuc ban, luc bat
su viet » so viet
san ky » sang ky, van ky, dan ky
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu san ky nang x hoi. hieu va nhan ((luc ban) or (cua ban)) hanh vi ((va triet) or (su viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu san ky nang x hoi. hieu va nhan ((luc ban) OR (cua ban)) hanh vi ((va triet) OR (su viet)).
• Adding a wildcard symbol may retrieve word variants: thu san ky nang x hoi. hieu va nhan ((luc ban) or (cua ban)) hanh vi ((va triet) or (su viet))*.