Perhaps you should try some spelling variations:
nghien cua » nghien cuu, nghiep cua, nghiep vua
doanh khoa » toan khoa
tac doanh » cac doanh, tac danh, toan doanh
ban thanh » ban hanh, ban hang
thanh van » thanh san, thanh toan, thanh phan
thoi tap » toi tap, hoc tap, thoi dai
cong tac » cong ty
khoa hoc » hoa hoc
va cach » va cac
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 bach) or (va cach)) thoi tap, nghien cua cong tac doanh khoa hoc ma hoa ban thanh van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((vu bach) OR (va cach)) thoi tap, nghien cua cong tac doanh khoa hoc ma hoa ban thanh van.
• Adding a wildcard symbol may retrieve word variants: ((vu bach) or (va cach)) thoi tap, nghien cua cong tac doanh khoa hoc ma hoa ban thanh van*.