Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
va triet » va thiet, va trien, ve triet
duc ban » duc tan, duc van, dua ban
thu sac » thu sach, thu san, thu xac
va nhan » van nhan, ca nhan, va phan
hieu va » lieu va, hieu qua
nang ma » tang ma, sang ma, nang cao
luc ban » cuc ban, luc bat, luc van
sac ky » cac ky, sai ky
ma hoi » mai hoi, xa hoi, ma hoa

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

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