Perhaps you should try some spelling variations:
nghien cua » nghien cuu, nghiep cua, nghiep vua
thanh toan » thanh hoa, tinh toan
danh hoan » doanh hoan, danh hoa, dang hoang
sach hoi » sach doi, sach moi, cach thoi
cong hoc » dong hoc, cong hoa, cong coc
hoc danh » hoc dan, hoc anh, hoc hanh
hoan hoc » hoa hoc, toan hoc, hoang hoa
su sach » so sach, vu sach
hoi tai » hoc tai, hoi trac
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 hoi tai, nghien cua cong hoc danh hoan hoc xa hai ban ((thanh toan) or (thanh san))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach hoi tai, nghien cua cong hoc danh hoan hoc xa hai ban ((thanh toan) OR (thanh san)).
• Adding a wildcard symbol may retrieve word variants: su sach hoi tai, nghien cua cong hoc danh hoan hoc xa hai ban ((thanh toan) or (thanh san))*.