Perhaps you should try some spelling variations:
doanh doanh » toan doanh, doanh thanh, dong doanh
nghien cua » nghien cuu, nghiep cua, nghiep vua
doanh hoan » doanh khoa, doanh nhan, doanh luan
ban thanh » ban hanh, ban hang
sach moi » sach doi, sach hoi, bach mai
cong hoc » dong hoc, cong hoa, cong coc
su sach » so sach, vu sach
moi tai » hoi tai, mo tai, moi thoi
hai ban » hai bang, hai ba, tai ban
hoc xa » hoc ma
xa hai » xa thai, xua hai, xa hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach moi tai, nghien cua cong hoc ((doanh hoan) OR (doanh doanh)) hoc xa hai ban thanh san~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach moi tai, nghien cua cong hoc ((doanh hoan) OR (doanh doanh)) hoc xa hai ban thanh san".
• Adding a wildcard symbol may retrieve word variants: su sach moi tai, nghien cua cong hoc ((doanh hoan) OR (doanh doanh)) hoc xa hai ban thanh san*.