Perhaps you should try some spelling variations:
nghien cua » nghien cuu, nghiep cua, nghiep vua
doanh toan » doanh hoan, doanh doanh, doanh thanh
van thanh » ban thanh, van tuan
thanh van » thanh san, thanh toan, thanh phan
sach doi » sach hoi, sach moi, sach dao
cong hoc » dong hoc, cong hoa, cong coc
su sach » so sach, vu sach
doi tai » hoi tai, dai tai, doi tac
hoi van » hoi va, hoi dan, hai van
ma hoi » mai hoi, xa hoi, ma hoa

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