Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
qua nhan » cua nhan, qua nhat, qua phan
va trien » va truyen, va thiet, va tuyen
va triet » va thiet, ve triet, cua triet
nhan duc » nhan duoc, nhan luc, phan duc
ban hang » ngan hang
duc ban » duc tan, duc van, dua ban
hang vi » hang va, hanh vi, hang di
sang ma » tang ma, nang ma, sang tao
ky sang » ky nang, ky dang, ky tang
thu sac » thu sach, thu san, thu xac
ma hoi » mai hoi, xa hoi, ma hoa
sac ky » cac ky, sai ky

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 sang ma hoi. hieu qua nhan duc ban hang vi ((((va triet) or (va trien))) or (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sac ky sang ma hoi. hieu qua nhan duc ban hang vi ((((va triet) OR (va trien))) OR (su triet)).
• Adding a wildcard symbol may retrieve word variants: thu sac ky sang ma hoi. hieu qua nhan duc ban hang vi ((((va triet) or (va trien))) or (su triet))*.