Perhaps you should try some spelling variations:
thanh lap » thanh san, phan lap, thanh hai
ban thanh » ban hanh, ban hang
cua viet » ca viet, hoa viet, cua vat
hoa hoi » khoa hoi, hoa hoc, hoa doi
hieu ve » hieu va, hieu van
cac duc » cac du, cao duc, cac dac
duc ban » duc tan, duc van, dua ban
ky lang » ky nang, ky dang, ky tang
lap cua » lai cua, tap cua, lam cua
ha hoi » ha noi, xa hoi, va hoi
xac ky » cac ky, sac ky, bac ky
ve cac » va cac, vien cac
su xac » pu xac, su cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: su xac ky lang ((ha hoi) or (hoa hoi)). hieu ve cac duc ban thanh lap cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su xac ky lang ((ha hoi) OR (hoa hoi)). hieu ve cac duc ban thanh lap cua viet.
• Adding a wildcard symbol may retrieve word variants: su xac ky lang ((ha hoi) or (hoa hoi)). hieu ve cac duc ban thanh lap cua viet*.