Perhaps you should try some spelling variations:
nghien cua » nghien cuu, nghiep cua, nghiep vua
doanh khoa » toan khoa
thanh toan » thanh hoa, tinh toan
coc doanh » cac doanh, hoa doanh, cho doanh
sach hoi » sach doi, sach moi, cach thoi
cong coc » cong cuoc, cong cac, cong co
khoa hoc » hoa hoc
su sach » so sach, vu sach
hoi tap » hoi dap, hoc tap, hoi tai
hoi van » hoi va, hoi dan, hai van
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 cua cong coc doanh khoa hoc xa hoi van ((thanh toan) or (thanh san))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach hoi tap, nghien cua cong coc doanh khoa hoc xa hoi van ((thanh toan) OR (thanh san)).
• Adding a wildcard symbol may retrieve word variants: su sach hoi tap, nghien cua cong coc doanh khoa hoc xa hoi van ((thanh toan) or (thanh san))*.