Perhaps you should try some spelling variations:
doanh doanh » toan doanh, doanh hoan, doanh thanh
nghien cua » nghien cuu, nghiep cua, nghiep vua
hoa doanh » toan doanh, hoa dan
doanh hoc » danh hoc, doanh khoa, doanh hoan
van thanh » ban thanh, van tuan
cong hoa » dong hoa, dong hoc, hang hoa
vu sach » vu bach, su sach, vu khach
hoi tai » hoi trac
hoc tai » hoc dai, hoc tap, hoc bai
hai van » thai van, ha van, hai tan
ma hai » ta hai, va hai, xa hai

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach ((hoi tai) or (hoc tai)), nghien cua cong hoa doanh doanh hoc ma hai van thanh san~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ((hoi tai) OR (hoc tai)), nghien cua cong hoa doanh doanh hoc ma hai van thanh san.
• Adding a wildcard symbol may retrieve word variants: vu sach ((hoi tai) or (hoc tai)), nghien cua cong hoa doanh doanh hoc ma hai van thanh san*.