Perhaps you should try some spelling variations:
nghien cua » nghien cuu, nghiep cua, nghiep vua
doanh hoan » doanh doanh, doanh khoa, doanh nhan
hoc doanh » hoa doanh, hoc danh, hoc dan
ban thanh » ban hanh, ban hang
sach moi » sach hoi, bach mai, sach bai
sach doi » sach hoi, sach dao, sach bai
cong hoc » dong hoc, cong hoa, cong coc
hoan hoc » hoa hoc, toan hoc, hoang hoa
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) OR (sach doi)) tai, nghien cua cong hoc doanh hoan hoc xa hai ban thanh san~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sach moi) OR (sach doi)) tai, nghien cua cong hoc doanh hoan hoc xa hai ban thanh san".
• Adding a wildcard symbol may retrieve word variants: su ((sach moi) OR (sach doi)) tai, nghien cua cong hoc doanh hoan hoc xa hai ban thanh san*.