Perhaps you should try some spelling variations:
doanh thuong » doan phuong, anh thuong, dinh thuong
nghien thu » nghiem thuc, nghiep thuc, nghien cuu
thuong hoc » truong hoc, tuong hoc, thuong ho
hoa doanh » toan doanh, hoa dan
thanh van » thanh san, thanh toan, thanh phan
cach hoc » cach thuc, cach thoi, dich hoc
cong hoa » dong hoa, dong hoc, hang hoa
te cach » ve cach, te sach, tu cach
hoi ban » hoi dan, hoi bai, doi ban
hoc bai » hoc dai, hoc giai

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

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