Perhaps you should try some spelling variations:
nghien cua » nghien cuu, nghiep cua, nghiep vua
doanh khoa » toan khoa
cac doanh » cac dan, cac dang, van doanh
ban thanh » ban hanh, ban hang
thanh van » thanh san, thanh toan, thanh phan
tong tap » tuong tac, trong tan, cong tac
cong cac » cuong cac, cong tac, cong cau
khoa hoc » hoa hoc
vu cach » va cach, ve cach, vu bach
toi gap » toi tap, toi gian
hoa ban » hoa dan, hoa van, hoa han

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu cach ((tong tap) or (toi gap)), nghien cua cong cac doanh khoa hoc ma hoa ban thanh van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu cach ((tong tap) OR (toi gap)), nghien cua cong cac doanh khoa hoc ma hoa ban thanh van.
• Adding a wildcard symbol may retrieve word variants: vu cach ((tong tap) or (toi gap)), nghien cua cong cac doanh khoa hoc ma hoa ban thanh van*.