Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
va trien » va truyen, va thiet, va tuyen
ban hang » ngan hang
lang van » dang van, tang van, hoang van
duc ban » duc tan, duc van, dua ban
hang di » hang doi, hang vi, hang dien
qua cam » qua cham, qua cac, qua ca
cam duc » cam xuc, cao duc, pham duc
ky lang » ky nang, ky dang, ky tang
te ban » te bao
tu dan » tuc dan, tu ban, cu dan

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu dan) or (te ban)) ky lang van hoa. hieu qua cam duc ban hang di ((va trien) or (cua viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu dan) OR (te ban)) ky lang van hoa. hieu qua cam duc ban hang di ((va trien) OR (cua viet)).
• Adding a wildcard symbol may retrieve word variants: ((tu dan) or (te ban)) ky lang van hoa. hieu qua cam duc ban hang di ((va trien) or (cua viet))*.