Perhaps you should try some spelling variations:
doanh khoa » toan khoa
thanh toan » thanh hoa, thanh san, tinh toan
hoc doanh » hoa doanh, hoc danh, hoc dan
sach hoi » sach doi, sach moi, cach thoi
cuu cong » cua cong, thu cong, cac cong
cong hoc » dong hoc, cong hoa, cong coc
khoa hoc » hoa hoc
phan van » pham van, thanh van, luan van
su sach » so sach, vu sach
hoi tap » hoi dap, hoc tap, hoi tai
hoi cac » hoc cac, voi cac, hoa cac
hoc xa » hoc ma

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 tap, nghien cuu cong hoc doanh khoa hoc xa hoi cac ((phan van) or (thanh toan))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach hoi tap, nghien cuu cong hoc doanh khoa hoc xa hoi cac ((phan van) OR (thanh toan)).
• Adding a wildcard symbol may retrieve word variants: su sach hoi tap, nghien cuu cong hoc doanh khoa hoc xa hoi cac ((phan van) or (thanh toan))*.