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
van thanh » ban thanh, van tuan
sach hoi » sach doi, sach moi, cach thoi
cong hoc » dong hoc, cong hoa, cong coc
hoan hoc » hoa hoc, toan hoc, hoang hoa
su sach » so sach, vu sach
hoi tai » hoc tai, hoi trac
xa hai » xa thai, xua hai, xa hoi
va hai » van hai, va chai, va khai

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 hoi tai, nghien cua cong hoc doanh hoan hoc ((xa hai) or (va hai)) van thanh san~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach hoi tai, nghien cua cong hoc doanh hoan hoc ((xa hai) OR (va hai)) van thanh san.
• Adding a wildcard symbol may retrieve word variants: su sach hoi tai, nghien cua cong hoc doanh hoan hoc ((xa hai) or (va hai)) van thanh san*.