Perhaps you should try some spelling variations:
nghien cua » nghien cuu, nghiep cua, nghiep vua
doanh khoa » toan khoa
coc doanh » cac doanh, hoa doanh, cho doanh
van thanh » van tuan
ban thanh » ban hanh, ban hang
cac thoi » cac toi, cac hop, cac tro
thoi tap » toi tap, hoc tap, thoi dai
cong coc » cong cuoc, cong cac, cong co
khoa hoc » hoa hoc
ve cac » va cac, vien cac
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: ve cac thoi tap, nghien cua cong coc doanh khoa hoc ma hoi ((van thanh) or (ban thanh)) van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ve cac thoi tap, nghien cua cong coc doanh khoa hoc ma hoi ((van thanh) OR (ban thanh)) van.
• Adding a wildcard symbol may retrieve word variants: ve cac thoi tap, nghien cua cong coc doanh khoa hoc ma hoi ((van thanh) or (ban thanh)) van*.